238578840 has 48 divisors (see below), whose sum is σ = 775382400. Its totient is φ = 63620928.

The previous prime is 238578817. The next prime is 238578859. The reversal of 238578840 is 48875832.

238578840 is a `hidden beast` number, since 2 + 38 + 578 + 8 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 331000 + ... + 331719.

It is an arithmetic number, because the mean of its divisors is an integer number (16153800).

Almost surely, 2^238578840 is an apocalyptic number.

238578840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238578840 is an abundant number, since it is smaller than the sum of its proper divisors (536803560).

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

238578840 is a wasteful number, since it uses less digits than its factorization.

238578840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662736 (or 662729 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 238578840 is about 15445.9975398159. The cubic root of 238578840 is about 620.2174402085.

It can be divided in two parts, 2385 and 78840, that added together give a square (81225 = 285²).

The spelling of 238578840 in words is "two hundred thirty-eight million, five hundred seventy-eight thousand, eight hundred forty".