75138864 has 40 divisors (see below), whose sum is σ = 194779200. Its totient is φ = 24959808.

The previous prime is 75138781. The next prime is 75138871. The reversal of 75138864 is 46883157.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12187 + ... + 17285.

It is an arithmetic number, because the mean of its divisors is an integer number (4869480).

Almost surely, 2^75138864 is an apocalyptic number.

It is an amenable number.

75138864 is an abundant number, since it is smaller than the sum of its proper divisors (119640336).

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

75138864 is a wasteful number, since it uses less digits than its factorization.

75138864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5417 (or 5411 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 75138864 is about 8668.2676469984. The cubic root of 75138864 is about 421.9764442577.

The spelling of 75138864 in words is "seventy-five million, one hundred thirty-eight thousand, eight hundred sixty-four".