238978590 has 32 divisors (see below), whose sum is σ = 584374176. Its totient is φ = 62524800.

The previous prime is 238978543. The next prime is 238978591. The reversal of 238978590 is 95879832.

It is a super-2 number, since 2×238978590² = 114221532956776200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238978591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73561 + ... + 76740.

It is an arithmetic number, because the mean of its divisors is an integer number (18261693).

Almost surely, 2^238978590 is an apocalyptic number.

238978590 is an abundant number, since it is smaller than the sum of its proper divisors (345395586).

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

238978590 is a wasteful number, since it uses less digits than its factorization.

238978590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150364.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 238978590 is about 15458.9323693456. The cubic root of 238978590 is about 620.5636480234.

The spelling of 238978590 in words is "two hundred thirty-eight million, nine hundred seventy-eight thousand, five hundred ninety".