238406928 has 20 divisors (see below), whose sum is σ = 615884688. Its totient is φ = 79468960.

The previous prime is 238406893. The next prime is 238406933. The reversal of 238406928 is 829604832.

It is a self number, because there is not a number n which added to its sum of digits gives 238406928.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2483358 + ... + 2483453.

Almost surely, 2^238406928 is an apocalyptic number.

It is an amenable number.

238406928 is an abundant number, since it is smaller than the sum of its proper divisors (377477760).

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

238406928 is a wasteful number, since it uses less digits than its factorization.

238406928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4966822 (or 4966816 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 238406928 is about 15440.4316001853. The cubic root of 238406928 is about 620.0684350404.

The spelling of 238406928 in words is "two hundred thirty-eight million, four hundred six thousand, nine hundred twenty-eight".