400296177640 has 32 divisors (see below), whose sum is σ = 902150254080. Its totient is φ = 159854674752.

The previous prime is 400296177599. The next prime is 400296177653. The reversal of 400296177640 is 46771692004.

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, 8219052 + ... + 8267611.

It is an arithmetic number, because the mean of its divisors is an integer number (28192195440).

Almost surely, 2^400296177640 is an apocalyptic number.

400296177640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400296177640 is an abundant number, since it is smaller than the sum of its proper divisors (501854076440).

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

400296177640 is a wasteful number, since it uses less digits than its factorization.

400296177640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16487281 (or 16487277 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 400296177640 in words is "four hundred billion, two hundred ninety-six million, one hundred seventy-seven thousand, six hundred forty".