400056080 has 20 divisors (see below), whose sum is σ = 930130572. Its totient is φ = 160022400.

The previous prime is 400056071. The next prime is 400056109. The reversal of 400056080 is 80650004.

It can be written as a sum of positive squares in 2 ways, for example, as 309197056 + 90859024 = 17584^2 + 9532^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 2500271 + ... + 2500430.

Almost surely, 2^400056080 is an apocalyptic number.

400056080 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400056080 is an abundant number, since it is smaller than the sum of its proper divisors (530074492).

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

400056080 is a wasteful number, since it uses less digits than its factorization.

400056080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000714 (or 5000708 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 400056080 is about 20001.4019508633. The cubic root of 400056080 is about 736.8407315334.

The spelling of 400056080 in words is "four hundred million, fifty-six thousand, eighty".