64878692 has 12 divisors (see below), whose sum is σ = 119513520. Its totient is φ = 30731976.

The previous prime is 64878683. The next prime is 64878703. The reversal of 64878692 is 29687846.

It is a self number, because there is not a number n which added to its sum of digits gives 64878692.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426758 + ... + 426909.

It is an arithmetic number, because the mean of its divisors is an integer number (9959460).

Almost surely, 2^64878692 is an apocalyptic number.

It is an amenable number.

64878692 is a deficient number, since it is larger than the sum of its proper divisors (54634828).

64878692 is a wasteful number, since it uses less digits than its factorization.

64878692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853690 (or 853688 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 50.

The square root of 64878692 is about 8054.7310321326. The cubic root of 64878692 is about 401.8222938392.

The spelling of 64878692 in words is "sixty-four million, eight hundred seventy-eight thousand, six hundred ninety-two".