400615431 has 8 divisors (see below), whose sum is σ = 534255360. Its totient is φ = 267026232.

The previous prime is 400615381. The next prime is 400615447. The reversal of 400615431 is 134516004.

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

It is not a de Polignac number, because 400615431 - 2⁹ = 400614919 is a prime.

It is a super-2 number, since 2×400615431² = 320985447110631522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400615471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13426 + ... + 31328.

It is an arithmetic number, because the mean of its divisors is an integer number (66781920).

Almost surely, 2^400615431 is an apocalyptic number.

400615431 is a deficient number, since it is larger than the sum of its proper divisors (133639929).

400615431 is a wasteful number, since it uses less digits than its factorization.

400615431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25365.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 400615431 is about 20015.3798614965. The cubic root of 400615431 is about 737.1839839603.

The spelling of 400615431 in words is "four hundred million, six hundred fifteen thousand, four hundred thirty-one".