388686234 has 16 divisors (see below), whose sum is σ = 788322240. Its totient is φ = 127737120.

The previous prime is 388686187. The next prime is 388686239. The reversal of 388686234 is 432686883.

It is a happy number.

It is a super-2 number, since 2×388686234² = 302153977002205512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388686239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455779 + ... + 456630.

It is an arithmetic number, because the mean of its divisors is an integer number (49270140).

Almost surely, 2^388686234 is an apocalyptic number.

388686234 is an abundant number, since it is smaller than the sum of its proper divisors (399636006).

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

388686234 is a wasteful number, since it uses less digits than its factorization.

388686234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912485.

The product of its digits is 1327104, while the sum is 48.

The square root of 388686234 is about 19715.1270348431. The cubic root of 388686234 is about 729.7930444798.

The spelling of 388686234 in words is "three hundred eighty-eight million, six hundred eighty-six thousand, two hundred thirty-four".