400672536 has 32 divisors (see below), whose sum is σ = 1092744000. Its totient is φ = 121415840.

The previous prime is 400672523. The next prime is 400672607. The reversal of 400672536 is 635276004.

It is a super-2 number, since 2×400672536² = 321076962209342592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 400672497 and 400672506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 758586 + ... + 759113.

It is an arithmetic number, because the mean of its divisors is an integer number (34148250).

Almost surely, 2^400672536 is an apocalyptic number.

It is an amenable number.

400672536 is an abundant number, since it is smaller than the sum of its proper divisors (692071464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400672536 is a wasteful number, since it uses less digits than its factorization.

400672536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517719 (or 1517715 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 400672536 is about 20016.8063386745. The cubic root of 400672536 is about 737.2190091475.

The spelling of 400672536 in words is "four hundred million, six hundred seventy-two thousand, five hundred thirty-six".