64723008 has 56 divisors (see below), whose sum is σ = 195714112. Its totient is φ = 18491904.

The previous prime is 64723007. The next prime is 64723031. The reversal of 64723008 is 80032746.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (64723007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22735 + ... + 25422.

Almost surely, 2^64723008 is an apocalyptic number.

It is an amenable number.

64723008 is an abundant number, since it is smaller than the sum of its proper divisors (130991104).

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

64723008 is a wasteful number, since it uses less digits than its factorization.

64723008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48179 (or 48169 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 64723008 is about 8045.0610936151. The cubic root of 64723008 is about 401.5006299013.

The spelling of 64723008 in words is "sixty-four million, seven hundred twenty-three thousand, eight".