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28496580 = 22357193571
BaseRepresentation
bin110110010110…
…1001011000100
31222121202221220
41230231023010
524243342310
62454440340
7464134260
oct154551304
958552856
1028496580
11150a39a2
1296630b0
135b998a8
143adb0a0
15277d670
hex1b2d2c4

28496580 has 96 divisors (see below), whose sum is σ = 96015360. Its totient is φ = 6168960.

The previous prime is 28496557. The next prime is 28496581. The reversal of 28496580 is 8569482.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (28496581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6195 + ... + 9765.

It is an arithmetic number, because the mean of its divisors is an integer number (1000160).

Almost surely, 228496580 is an apocalyptic number.

28496580 is a gapful number since it is divisible by the number (20) 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 28496580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48007680).

28496580 is an abundant number, since it is smaller than the sum of its proper divisors (67518780).

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

28496580 is a wasteful number, since it uses less digits than its factorization.

28496580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609 (or 3607 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 28496580 is about 5338.2188040581. The cubic root of 28496580 is about 305.4435184962.

The spelling of 28496580 in words is "twenty-eight million, four hundred ninety-six thousand, five hundred eighty".

Divisors: 1 2 3 4 5 6 7 10 12 14 15 19 20 21 28 30 35 38 42 57 60 70 76 84 95 105 114 133 140 190 210 228 266 285 380 399 420 532 570 665 798 1140 1330 1596 1995 2660 3571 3990 7142 7980 10713 14284 17855 21426 24997 35710 42852 49994 53565 67849 71420 74991 99988 107130 124985 135698 149982 203547 214260 249970 271396 299964 339245 374955 407094 474943 499940 678490 749910 814188 949886 1017735 1356980 1424829 1499820 1899772 2035470 2374715 2849658 4070940 4749430 5699316 7124145 9498860 14248290 28496580