74640864 has 48 divisors (see below), whose sum is σ = 196514640. Its totient is φ = 24806400.

The previous prime is 74640799. The next prime is 74640883. The reversal of 74640864 is 46804647.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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, 38314 + ... + 40214.

It is an arithmetic number, because the mean of its divisors is an integer number (4094055).

Almost surely, 2^74640864 is an apocalyptic number.

It is an amenable number.

74640864 is an abundant number, since it is smaller than the sum of its proper divisors (121873776).

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

74640864 is a wasteful number, since it uses less digits than its factorization.

74640864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323 (or 2315 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 74640864 is about 8639.4944296527. The cubic root of 74640864 is about 421.0421286240.

The spelling of 74640864 in words is "seventy-four million, six hundred forty thousand, eight hundred sixty-four".