400615680 has 72 divisors (see below), whose sum is σ = 1279478592. Its totient is φ = 106829824.

The previous prime is 400615673. The next prime is 400615681. The reversal of 400615680 is 86516004.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (400615681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48324 + ... + 56003.

It is an arithmetic number, because the mean of its divisors is an integer number (17770536).

Almost surely, 2^400615680 is an apocalyptic number.

400615680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400615680 is an abundant number, since it is smaller than the sum of its proper divisors (878862912).

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

400615680 is a wasteful number, since it uses less digits than its factorization.

400615680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104351 (or 104337 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 400615680 is about 20015.3860817122. The cubic root of 400615680 is about 737.1841366910.

The spelling of 400615680 in words is "four hundred million, six hundred fifteen thousand, six hundred eighty".