64393788 has 12 divisors (see below), whose sum is σ = 150252200. Its totient is φ = 21464592.

The previous prime is 64393759. The next prime is 64393817. The reversal of 64393788 is 88739346.

It is an interprime number because it is at equal distance from previous prime (64393759) and next prime (64393817).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 2683063 + ... + 2683086.

Almost surely, 2^64393788 is an apocalyptic number.

It is an amenable number.

64393788 is an abundant number, since it is smaller than the sum of its proper divisors (85858412).

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

64393788 is a wasteful number, since it uses less digits than its factorization.

64393788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5366156 (or 5366154 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 64393788 is about 8024.5740073851. The cubic root of 64393788 is about 400.8187147886.

The spelling of 64393788 in words is "sixty-four million, three hundred ninety-three thousand, seven hundred eighty-eight".