400974531 has 8 divisors (see below), whose sum is σ = 546008064. Its totient is φ = 261628680.

The previous prime is 400974487. The next prime is 400974557. The reversal of 400974531 is 135479004.

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

It is not a de Polignac number, because 400974531 - 2⁶ = 400974467 is a prime.

It is a super-2 number, since 2×400974531² = 321561149021339922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400974492 and 400974501.

It is not an unprimeable number, because it can be changed into a prime (400974031) 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, 1421755 + ... + 1422036.

It is an arithmetic number, because the mean of its divisors is an integer number (68251008).

Almost surely, 2^400974531 is an apocalyptic number.

400974531 is a deficient number, since it is larger than the sum of its proper divisors (145033533).

400974531 is a wasteful number, since it uses less digits than its factorization.

400974531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843841.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 400974531 is about 20024.3484538199. The cubic root of 400974531 is about 737.4041815954.

The spelling of 400974531 in words is "four hundred million, nine hundred seventy-four thousand, five hundred thirty-one".