64568268 has 72 divisors (see below), whose sum is σ = 176248800. Its totient is φ = 19869696.

The previous prime is 64568263. The next prime is 64568269. The reversal of 64568268 is 86286546.

64568268 is a `hidden beast` number, since 64 + 568 + 26 + 8 = 666.

It is a super-2 number, since 2×64568268² = 8338122465039648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64568263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22668 + ... + 25356.

It is an arithmetic number, because the mean of its divisors is an integer number (2447900).

Almost surely, 2^64568268 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64568268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88124400).

64568268 is an abundant number, since it is smaller than the sum of its proper divisors (111680532).

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

64568268 is a wasteful number, since it uses less digits than its factorization.

64568268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751 (or 2746 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 64568268 is about 8035.4382581164. The cubic root of 64568268 is about 401.1804048511.

The spelling of 64568268 in words is "sixty-four million, five hundred sixty-eight thousand, two hundred sixty-eight".