400364531 has 8 divisors (see below), whose sum is σ = 469926240. Its totient is φ = 333894528.

The previous prime is 400364509. The next prime is 400364539. The reversal of 400364531 is 135463004.

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

It is a cyclic number.

It is not a de Polignac number, because 400364531 - 2¹⁸ = 400102387 is a prime.

It is a super-2 number, since 2×400364531² = 320583515365699922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400364531.

It is not an unprimeable number, because it can be changed into a prime (400364539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 772646 + ... + 773163.

It is an arithmetic number, because the mean of its divisors is an integer number (58740780).

Almost surely, 2^400364531 is an apocalyptic number.

400364531 is a deficient number, since it is larger than the sum of its proper divisors (69561709).

400364531 is a wasteful number, since it uses less digits than its factorization.

400364531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545853.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 400364531 is about 20009.1111996510. Note that the first 4 decimals coincide. The cubic root of 400364531 is about 737.0300557179.

The spelling of 400364531 in words is "four hundred million, three hundred sixty-four thousand, five hundred thirty-one".