400376312478 has 24 divisors (see below), whose sum is σ = 899610974808. Its totient is φ = 133458770664.

The previous prime is 400376312471. The next prime is 400376312507. The reversal of 400376312478 is 874213673004.

400376312478 is a `hidden beast` number, since 4 + 0 + 0 + 3 + 7 + 631 + 2 + 4 + 7 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400376312471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 411909301 + ... + 411910272.

It is an arithmetic number, because the mean of its divisors is an integer number (37483790617).

Almost surely, 2^400376312478 is an apocalyptic number.

400376312478 is an abundant number, since it is smaller than the sum of its proper divisors (499234662330).

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

400376312478 is an equidigital number, since it uses as much as digits as its factorization.

400376312478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823819590 (or 823819578 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 400376312478 in words is "four hundred billion, three hundred seventy-six million, three hundred twelve thousand, four hundred seventy-eight".