400557058840 has 32 divisors (see below), whose sum is σ = 904189088880. Its totient is φ = 159700920192.

The previous prime is 400557058819. The next prime is 400557058841. The reversal of 400557058840 is 48850755004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400557058841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16297047 + ... + 16321606.

Almost surely, 2^400557058840 is an apocalyptic number.

400557058840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400557058840 is an abundant number, since it is smaller than the sum of its proper divisors (503632030040).

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

400557058840 is a wasteful number, since it uses less digits than its factorization.

400557058840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32618971 (or 32618967 counting only the distinct ones).

The product of its (nonzero) digits is 896000, while the sum is 46.

The spelling of 400557058840 in words is "four hundred billion, five hundred fifty-seven million, fifty-eight thousand, eight hundred forty".