238818890900 has 36 divisors (see below), whose sum is σ = 518300589660. Its totient is φ = 95515833600.

The previous prime is 238818890873. The next prime is 238818890987. The reversal of 238818890900 is 9098818832.

It can be written as a sum of positive squares in 6 ways, for example, as 5493181456 + 233325709444 = 74116^2 + 483038^2 .

It is a super-2 number, since 2×238818890900² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 696560 + ... + 981240.

Almost surely, 2^238818890900 is an apocalyptic number.

238818890900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238818890900 is an abundant number, since it is smaller than the sum of its proper divisors (279481698760).

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

238818890900 is a wasteful number, since it uses less digits than its factorization.

238818890900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293084 (or 293077 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 56.

The spelling of 238818890900 in words is "two hundred thirty-eight billion, eight hundred eighteen million, eight hundred ninety thousand, nine hundred".