400120356 has 24 divisors (see below), whose sum is σ = 934425184. Its totient is φ = 133257600.

The previous prime is 400120339. The next prime is 400120363. The reversal of 400120356 is 653021004.

It is a happy 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, 531 + ... + 28293.

Almost surely, 2^400120356 is an apocalyptic number.

It is an amenable number.

400120356 is an abundant number, since it is smaller than the sum of its proper divisors (534304828).

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

400120356 is a wasteful number, since it uses less digits than its factorization.

400120356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28971 (or 28969 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 400120356 is about 20003.0086736971. The cubic root of 400120356 is about 736.8801915333.

The spelling of 400120356 in words is "four hundred million, one hundred twenty thousand, three hundred fifty-six".