400431134 has 8 divisors (see below), whose sum is σ = 608874960. Its totient is φ = 197472816.

The previous prime is 400431091. The next prime is 400431167. The reversal of 400431134 is 431134004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1371194 + ... + 1371485.

It is an arithmetic number, because the mean of its divisors is an integer number (76109370).

Almost surely, 2^400431134 is an apocalyptic number.

400431134 is a deficient number, since it is larger than the sum of its proper divisors (208443826).

400431134 is a wasteful number, since it uses less digits than its factorization.

400431134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742754.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 400431134 is about 20010.7754472434. The cubic root of 400431134 is about 737.0709232167.

Adding to 400431134 its reverse (431134004), we get a palindrome (831565138).

The spelling of 400431134 in words is "four hundred million, four hundred thirty-one thousand, one hundred thirty-four".