238521672 has 40 divisors (see below), whose sum is σ = 668083350. Its totient is φ = 79507008.

The previous prime is 238521671. The next prime is 238521683. The reversal of 238521672 is 276125832.

238521672 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 only one way, i.e., 232440516 + 6081156 = 15246^2 + 2466^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (238521671) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 183397 + ... + 184692.

Almost surely, 2^238521672 is an apocalyptic number.

It is an amenable number.

238521672 is an abundant number, since it is smaller than the sum of its proper divisors (429561678).

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

238521672 is a wasteful number, since it uses less digits than its factorization.

238521672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368107 (or 368094 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 238521672 is about 15444.1468524487. The cubic root of 238521672 is about 620.1678976436.

The spelling of 238521672 in words is "two hundred thirty-eight million, five hundred twenty-one thousand, six hundred seventy-two".