400395760 has 40 divisors (see below), whose sum is σ = 931877856. Its totient is φ = 159993600.

The previous prime is 400395739. The next prime is 400395763. The reversal of 400395760 is 67593004.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400395763) 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, 102157 + ... + 106003.

Almost surely, 2^400395760 is an apocalyptic number.

400395760 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400395760 is an abundant number, since it is smaller than the sum of its proper divisors (531482096).

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

400395760 is a wasteful number, since it uses less digits than its factorization.

400395760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5161 (or 5155 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 400395760 is about 20009.8915539290. The cubic root of 400395760 is about 737.0492183488.

The spelling of 400395760 in words is "four hundred million, three hundred ninety-five thousand, seven hundred sixty".