400997304 has 40 divisors (see below), whose sum is σ = 1123165560. Its totient is φ = 133665552.

The previous prime is 400997287. The next prime is 400997323. The reversal of 400997304 is 403799004.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 308764 + ... + 310059.

It is an arithmetic number, because the mean of its divisors is an integer number (28079139).

Almost surely, 2^400997304 is an apocalyptic number.

It is an amenable number.

400997304 is an abundant number, since it is smaller than the sum of its proper divisors (722168256).

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

400997304 is a wasteful number, since it uses less digits than its factorization.

400997304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618841 (or 618828 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 400997304 is about 20024.9170784800. The cubic root of 400997304 is about 737.4181414076.

The spelling of 400997304 in words is "four hundred million, nine hundred ninety-seven thousand, three hundred four".