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444920320 = 2951329461
BaseRepresentation
bin11010100001001…
…111001000000000
31011000012021221101
4122201033020000
51402344422240
6112052104144
714011521535
oct3241171000
91130167841
10444920320
11209167249
12105005054
137123b880
1443138d8c
15290d839a
hex1a84f200

444920320 has 160 divisors (see below), whose sum is σ = 1191017520. Its totient is φ = 158269440.

The previous prime is 444920317. The next prime is 444920323. The reversal of 444920320 is 23029444.

It is an interprime number because it is at equal distance from previous prime (444920317) and next prime (444920323).

It can be written as a sum of positive squares in 8 ways, for example, as 80568576 + 364351744 = 8976^2 + 19088^2 .

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-2 number, since 2×4449203202 = 395908182297804800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (444920323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 964890 + ... + 965350.

Almost surely, 2444920320 is an apocalyptic number.

444920320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 444920320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (595508760).

444920320 is an abundant number, since it is smaller than the sum of its proper divisors (746097200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

444920320 is a wasteful number, since it uses less digits than its factorization.

444920320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 444920320 is about 21093.1344280550. The cubic root of 444920320 is about 763.4151019788.

Adding to 444920320 its reverse (23029444), we get a palindrome (467949764).

The spelling of 444920320 in words is "four hundred forty-four million, nine hundred twenty thousand, three hundred twenty".

Divisors: 1 2 4 5 8 10 13 16 20 26 29 32 40 52 58 64 65 80 104 116 128 130 145 160 208 232 256 260 290 320 377 416 461 464 512 520 580 640 754 832 922 928 1040 1160 1280 1508 1664 1844 1856 1885 2080 2305 2320 2560 3016 3328 3688 3712 3770 4160 4610 4640 5993 6032 6656 7376 7424 7540 8320 9220 9280 11986 12064 13369 14752 14848 15080 16640 18440 18560 23972 24128 26738 29504 29965 30160 33280 36880 37120 47944 48256 53476 59008 59930 60320 66845 73760 74240 95888 96512 106952 118016 119860 120640 133690 147520 173797 191776 193024 213904 236032 239720 241280 267380 295040 347594 383552 427808 479440 482560 534760 590080 695188 767104 855616 868985 958880 965120 1069520 1180160 1390376 1534208 1711232 1737970 1917760 2139040 2780752 3068416 3422464 3475940 3835520 4278080 5561504 6844928 6951880 7671040 8556160 11123008 13903760 15342080 17112320 22246016 27807520 34224640 44492032 55615040 88984064 111230080 222460160 444920320