470238138 has 12 divisors (see below), whose sum is σ = 1018849338. Its totient is φ = 156746040.

The previous prime is 470238137. The next prime is 470238169. The reversal of 470238138 is 831832074.

It can be written as a sum of positive squares in only one way, i.e., 376864569 + 93373569 = 19413^2 + 9663^2 .

It is a super-2 number, since 2×470238138² = 442247812859414088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (470238137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13062153 + ... + 13062188.

Almost surely, 2^470238138 is an apocalyptic number.

470238138 is an abundant number, since it is smaller than the sum of its proper divisors (548611200).

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

470238138 is a wasteful number, since it uses less digits than its factorization.

470238138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26124349 (or 26124346 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 470238138 is about 21684.9749365776. The cubic root of 470238138 is about 777.6293009110.

The spelling of 470238138 in words is "four hundred seventy million, two hundred thirty-eight thousand, one hundred thirty-eight".