388672660 has 12 divisors (see below), whose sum is σ = 816212628. Its totient is φ = 155469056.

The previous prime is 388672651. The next prime is 388672681. The reversal of 388672660 is 66276883.

It can be written as a sum of positive squares in 2 ways, for example, as 254019844 + 134652816 = 15938^2 + 11604^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 388672660.

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, 9716797 + ... + 9716836.

It is an arithmetic number, because the mean of its divisors is an integer number (68017719).

Almost surely, 2^388672660 is an apocalyptic number.

It is an amenable number.

388672660 is an abundant number, since it is smaller than the sum of its proper divisors (427539968).

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

388672660 is a wasteful number, since it uses less digits than its factorization.

388672660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19433642 (or 19433640 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 388672660 is about 19714.7827784128. The cubic root of 388672660 is about 729.7845489160.

The spelling of 388672660 in words is "three hundred eighty-eight million, six hundred seventy-two thousand, six hundred sixty".