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2660023220 = 225794873457
BaseRepresentation
bin1001111010001100…
…1011101110110100
320212101022011212112
42132203023232310
520421431220340
61115541310152
7122626552511
oct23643135664
96771264775
102660023220
1111455718a8
12622a05358
1333512a64a
141b33c8308
151087da065
hex9e8cbbb4

2660023220 has 48 divisors (see below), whose sum is σ = 5670013440. Its totient is φ = 1048080384.

The previous prime is 2660023153. The next prime is 2660023229. The reversal of 2660023220 is 223200662.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660023229) 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, 767732 + ... + 771188.

It is an arithmetic number, because the mean of its divisors is an integer number (118125280).

Almost surely, 22660023220 is an apocalyptic number.

2660023220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2660023220 is an abundant number, since it is smaller than the sum of its proper divisors (3009990220).

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

2660023220 is a wasteful number, since it uses less digits than its factorization.

2660023220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4032 (or 4030 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 2660023220 is about 51575.4129406639. The cubic root of 2660023220 is about 1385.5700139086.

Adding to 2660023220 its reverse (223200662), we get a palindrome (2883223882).

The spelling of 2660023220 in words is "two billion, six hundred sixty million, twenty-three thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 79 158 316 395 487 790 974 1580 1948 2435 3457 4870 6914 9740 13828 17285 34570 38473 69140 76946 153892 192365 273103 384730 546206 769460 1092412 1365515 1683559 2731030 3367118 5462060 6734236 8417795 16835590 33671180 133001161 266002322 532004644 665005805 1330011610 2660023220