64039456 has 24 divisors (see below), whose sum is σ = 135776844. Its totient is φ = 29556480.

The previous prime is 64039441. The next prime is 64039457. The reversal of 64039456 is 65493046.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 58675600 + 5363856 = 7660^2 + 2316^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (64039457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76555 + ... + 77386.

Almost surely, 2^64039456 is an apocalyptic number.

It is an amenable number.

64039456 is an abundant number, since it is smaller than the sum of its proper divisors (71737388).

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

64039456 is a wasteful number, since it uses less digits than its factorization.

64039456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153964 (or 153956 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 64039456 is about 8002.4656200449. The cubic root of 64039456 is about 400.0821831137.

The spelling of 64039456 in words is "sixty-four million, thirty-nine thousand, four hundred fifty-six".