64644882 has 32 divisors (see below), whose sum is σ = 131604480. Its totient is φ = 21165840.

The previous prime is 64644871. The next prime is 64644901. The reversal of 64644882 is 28844646.

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, 134719 + ... + 135197.

It is an arithmetic number, because the mean of its divisors is an integer number (4112640).

Almost surely, 2^64644882 is an apocalyptic number.

64644882 is an abundant number, since it is smaller than the sum of its proper divisors (66959598).

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

64644882 is a wasteful number, since it uses less digits than its factorization.

64644882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838.

The product of its digits is 294912, while the sum is 42.

The square root of 64644882 is about 8040.2041018870. The cubic root of 64644882 is about 401.3390167503.

The spelling of 64644882 in words is "sixty-four million, six hundred forty-four thousand, eight hundred eighty-two".