431178138 has 12 divisors (see below), whose sum is σ = 934219338. Its totient is φ = 143726040.

The previous prime is 431178133. The next prime is 431178149. The reversal of 431178138 is 831871134.

It can be written as a sum of positive squares in only one way, i.e., 428365809 + 2812329 = 20697^2 + 1677^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (431178133) 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, 11977153 + ... + 11977188.

Almost surely, 2^431178138 is an apocalyptic number.

431178138 is an abundant number, since it is smaller than the sum of its proper divisors (503041200).

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

431178138 is a wasteful number, since it uses less digits than its factorization.

431178138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23954349 (or 23954346 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 431178138 is about 20764.8293515743. The cubic root of 431178138 is about 755.4729361489.

The spelling of 431178138 in words is "four hundred thirty-one million, one hundred seventy-eight thousand, one hundred thirty-eight".