400782857320 has 64 divisors (see below), whose sum is σ = 904515131520. Its totient is φ = 159824358144.

The previous prime is 400782857303. The next prime is 400782857333. The reversal of 400782857320 is 23758287004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17814799 + ... + 17837281.

It is an arithmetic number, because the mean of its divisors is an integer number (14133048930).

Almost surely, 2^400782857320 is an apocalyptic number.

400782857320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400782857320 is an abundant number, since it is smaller than the sum of its proper divisors (503732274200).

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

400782857320 is a wasteful number, since it uses less digits than its factorization.

400782857320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23834 (or 23830 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 46.

The spelling of 400782857320 in words is "four hundred billion, seven hundred eighty-two million, eight hundred fifty-seven thousand, three hundred twenty".