64075920 has 40 divisors (see below), whose sum is σ = 198636096. Its totient is φ = 17086848.

The previous prime is 64075903. The next prime is 64075927. The reversal of 64075920 is 2957046.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (64075927) 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, 133252 + ... + 133731.

Almost surely, 2^64075920 is an apocalyptic number.

64075920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64075920 is an abundant number, since it is smaller than the sum of its proper divisors (134560176).

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

64075920 is a wasteful number, since it uses less digits than its factorization.

64075920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266999 (or 266993 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 64075920 is about 8004.7435936450. The cubic root of 64075920 is about 400.1581041661.

The spelling of 64075920 in words is "sixty-four million, seventy-five thousand, nine hundred twenty".