400857880 has 32 divisors (see below), whose sum is σ = 902538000. Its totient is φ = 160235136.

The previous prime is 400857871. The next prime is 400857893. The reversal of 400857880 is 88758004.

It is a Smith number, since the sum of its digits (40) 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 (40).

It is a congruent 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, 85846 + ... + 90394.

Almost surely, 2^400857880 is an apocalyptic number.

400857880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400857880 is an abundant number, since it is smaller than the sum of its proper divisors (501680120).

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

400857880 is a wasteful number, since it uses less digits than its factorization.

400857880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6763 (or 6759 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 400857880 is about 20021.4355129696. The cubic root of 400857880 is about 737.3326664313.

The spelling of 400857880 in words is "four hundred million, eight hundred fifty-seven thousand, eight hundred eighty".