400686088 has 16 divisors (see below), whose sum is σ = 819585360. Its totient is φ = 182130000.

The previous prime is 400686053. The next prime is 400686119. The reversal of 400686088 is 880686004.

It is a happy number.

It is a super-2 number, since 2×400686088² = 321098682233487488, 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 400686088.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2276538 + ... + 2276713.

It is an arithmetic number, because the mean of its divisors is an integer number (51224085).

Almost surely, 2^400686088 is an apocalyptic number.

It is an amenable number.

400686088 is an abundant number, since it is smaller than the sum of its proper divisors (418899272).

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

400686088 is a wasteful number, since it uses less digits than its factorization.

400686088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4553268 (or 4553264 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 400686088 is about 20017.1448513518. The cubic root of 400686088 is about 737.2273207390.

The spelling of 400686088 in words is "four hundred million, six hundred eighty-six thousand, eighty-eight".