400097128920 has 32 divisors (see below), whose sum is σ = 1200291387120. Its totient is φ = 106692567680.

The previous prime is 400097128903. The next prime is 400097128957. The reversal of 400097128920 is 29821790004.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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, 1667071251 + ... + 1667071490.

Almost surely, 2^400097128920 is an apocalyptic number.

400097128920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400097128920 is an abundant number, since it is smaller than the sum of its proper divisors (800194258200).

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

400097128920 is a wasteful number, since it uses less digits than its factorization.

400097128920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334142755 (or 3334142751 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 400097128920 in words is "four hundred billion, ninety-seven million, one hundred twenty-eight thousand, nine hundred twenty".