387656664 has 24 divisors (see below), whose sum is σ = 969382860. Its totient is φ = 129186736.

The previous prime is 387656629. The next prime is 387656669. The reversal of 387656664 is 466656783.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387656669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 94447 + ... + 98465.

Almost surely, 2^387656664 is an apocalyptic number.

It is an amenable number.

387656664 is an abundant number, since it is smaller than the sum of its proper divisors (581726196).

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

387656664 is an frugal number, since it uses more digits than its factorization.

387656664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8047 (or 4024 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 51.

The square root of 387656664 is about 19688.9985524912. The cubic root of 387656664 is about 729.1481048851.

The spelling of 387656664 in words is "three hundred eighty-seven million, six hundred fifty-six thousand, six hundred sixty-four".