400157864 has 16 divisors (see below), whose sum is σ = 782917920. Its totient is φ = 191379760.

The previous prime is 400157861. The next prime is 400157867. The reversal of 400157864 is 468751004.

It is an interprime number because it is at equal distance from previous prime (400157861) and next prime (400157867).

It is a super-2 number, since 2×400157864² = 320252632242084992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400157861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1087202 + ... + 1087569.

It is an arithmetic number, because the mean of its divisors is an integer number (48932370).

Almost surely, 2^400157864 is an apocalyptic number.

It is an amenable number.

400157864 is a deficient number, since it is larger than the sum of its proper divisors (382760056).

400157864 is a wasteful number, since it uses less digits than its factorization.

400157864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174800 (or 2174796 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 400157864 is about 20003.9462106855. The cubic root of 400157864 is about 736.9032163042.

The spelling of 400157864 in words is "four hundred million, one hundred fifty-seven thousand, eight hundred sixty-four".