400377220 has 24 divisors (see below), whose sum is σ = 841440600. Its totient is φ = 160027392.

The previous prime is 400377209. The next prime is 400377233. The reversal of 400377220 is 22773004.

It can be written as a sum of positive squares in 4 ways, for example, as 18096516 + 382280704 = 4254^2 + 19552^2 .

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, 21576 + ... + 35584.

It is an arithmetic number, because the mean of its divisors is an integer number (35060025).

Almost surely, 2^400377220 is an apocalyptic number.

It is an amenable number.

400377220 is an abundant number, since it is smaller than the sum of its proper divisors (441063380).

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

400377220 is a wasteful number, since it uses less digits than its factorization.

400377220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15447 (or 15445 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 400377220 is about 20009.4282776895. The cubic root of 400377220 is about 737.0378420183.

The spelling of 400377220 in words is "four hundred million, three hundred seventy-seven thousand, two hundred twenty".