388290172 has 24 divisors (see below), whose sum is σ = 712282032. Its totient is φ = 185001600.

The previous prime is 388290167. The next prime is 388290187. The reversal of 388290172 is 271092883.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20479 + ... + 34582.

It is an arithmetic number, because the mean of its divisors is an integer number (29678418).

Almost surely, 2^388290172 is an apocalyptic number.

It is an amenable number.

388290172 is a deficient number, since it is larger than the sum of its proper divisors (323991860).

388290172 is a wasteful number, since it uses less digits than its factorization.

388290172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55149 (or 55147 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 388290172 is about 19705.0798526674. The cubic root of 388290172 is about 729.5450796698.

The spelling of 388290172 in words is "three hundred eighty-eight million, two hundred ninety thousand, one hundred seventy-two".