238158864 has 90 divisors (see below), whose sum is σ = 689108238. Its totient is φ = 76780800.

The previous prime is 238158829. The next prime is 238158919. The reversal of 238158864 is 468851832.

238158864 is a `hidden beast` number, since 2 + 3 + 8 + 1 + 588 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 221414400 + 16744464 = 14880^2 + 4092^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 137524 + ... + 139244.

Almost surely, 2^238158864 is an apocalyptic number.

238158864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238158864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344554119).

238158864 is an abundant number, since it is smaller than the sum of its proper divisors (450949374).

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

238158864 is a wasteful number, since it uses less digits than its factorization.

238158864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797 (or 1757 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 238158864 is about 15432.3965734425. The cubic root of 238158864 is about 619.8532986243.

The spelling of 238158864 in words is "two hundred thirty-eight million, one hundred fifty-eight thousand, eight hundred sixty-four".