400457880 has 48 divisors (see below), whose sum is σ = 1301489280. Its totient is φ = 106788672.

The previous prime is 400457833. The next prime is 400457881. The reversal of 400457880 is 88754004.

400457880 is a `hidden beast` number, since 4 + 0 + 0 + 4 + 578 + 80 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400457881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555832 + ... + 556551.

It is an arithmetic number, because the mean of its divisors is an integer number (27114360).

Almost surely, 2^400457880 is an apocalyptic number.

400457880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400457880 is an abundant number, since it is smaller than the sum of its proper divisors (901031400).

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

400457880 is a wasteful number, since it uses less digits than its factorization.

400457880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112400 (or 1112393 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 400457880 is about 20011.4437260284. The cubic root of 400457880 is about 737.0873332461.

The spelling of 400457880 in words is "four hundred million, four hundred fifty-seven thousand, eight hundred eighty".