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64026880 = 28550021
BaseRepresentation
bin1111010000111…
…1100100000000
311110110220100221
43310033210000
5112342330010
610204152424
71405135201
oct364174400
9143426327
1064026880
1133161385
1219538714
1310359b38
1487095a8
15594adda
hex3d0f900

64026880 has 36 divisors (see below), whose sum is σ = 153367452. Its totient is φ = 25610240.

The previous prime is 64026863. The next prime is 64026883. The reversal of 64026880 is 8862046.

It can be written as a sum of positive squares in 2 ways, for example, as 33732864 + 30294016 = 5808^2 + 5504^2 .

It is not an unprimeable number, because it can be changed into a prime (64026883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23731 + ... + 26290.

It is an arithmetic number, because the mean of its divisors is an integer number (4260207).

Almost surely, 264026880 is an apocalyptic number.

It is an amenable number.

64026880 is an abundant number, since it is smaller than the sum of its proper divisors (89340572).

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

64026880 is an equidigital number, since it uses as much as digits as its factorization.

64026880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50042 (or 50028 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 64026880 is about 8001.6798236370. The cubic root of 64026880 is about 400.0559921618.

The spelling of 64026880 in words is "sixty-four million, twenty-six thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 32 40 64 80 128 160 256 320 640 1280 50021 100042 200084 250105 400168 500210 800336 1000420 1600672 2000840 3201344 4001680 6402688 8003360 12805376 16006720 32013440 64026880