388671660 has 72 divisors (see below), whose sum is σ = 1269668400. Its totient is φ = 95672448.

The previous prime is 388671593. The next prime is 388671683. The reversal of 388671660 is 66176883.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80710 + ... + 85389.

Almost surely, 2^388671660 is an apocalyptic number.

388671660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

388671660 is an abundant number, since it is smaller than the sum of its proper divisors (880996740).

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

388671660 is a wasteful number, since it uses less digits than its factorization.

388671660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166127 (or 166122 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 388671660 is about 19714.7574167171. The cubic root of 388671660 is about 729.7839230379.

The spelling of 388671660 in words is "three hundred eighty-eight million, six hundred seventy-one thousand, six hundred sixty".