238521620 has 24 divisors (see below), whose sum is σ = 501417000. Its totient is φ = 95309312.

The previous prime is 238521593. The next prime is 238521667. The reversal of 238521620 is 26125832.

238521620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 75550864 + 162970756 = 8692^2 + 12766^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15296 + ... + 26664.

It is an arithmetic number, because the mean of its divisors is an integer number (20892375).

Almost surely, 2^238521620 is an apocalyptic number.

238521620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238521620 is an abundant number, since it is smaller than the sum of its proper divisors (262895380).

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

238521620 is a wasteful number, since it uses less digits than its factorization.

238521620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12427 (or 12425 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 238521620 is about 15444.1451689629. The cubic root of 238521620 is about 620.1678525761.

The spelling of 238521620 in words is "two hundred thirty-eight million, five hundred twenty-one thousand, six hundred twenty".