64432056 has 64 divisors (see below), whose sum is σ = 175341600. Its totient is φ = 19611648.

The previous prime is 64432019. The next prime is 64432061. The reversal of 64432056 is 65023446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29200 + ... + 31328.

Almost surely, 2^64432056 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 64432056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87670800).

64432056 is an abundant number, since it is smaller than the sum of its proper divisors (110909544).

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

64432056 is a wasteful number, since it uses less digits than its factorization.

64432056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248 (or 2244 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 64432056 is about 8026.9580788740. The cubic root of 64432056 is about 400.8980987043.

The spelling of 64432056 in words is "sixty-four million, four hundred thirty-two thousand, fifty-six".