388870434 has 24 divisors (see below), whose sum is σ = 858451932. Its totient is φ = 127177440.

The previous prime is 388870429. The next prime is 388870441. The reversal of 388870434 is 434078883.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 368755209 + 20115225 = 19203^2 + 4485^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 388870434.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202857 + ... + 204764.

Almost surely, 2^388870434 is an apocalyptic number.

388870434 is an abundant number, since it is smaller than the sum of its proper divisors (469581498).

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

388870434 is a wasteful number, since it uses less digits than its factorization.

388870434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407682 (or 407679 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The square root of 388870434 is about 19719.7980212780. The cubic root of 388870434 is about 729.9083102455.

The spelling of 388870434 in words is "three hundred eighty-eight million, eight hundred seventy thousand, four hundred thirty-four".