400997944 has 8 divisors (see below), whose sum is σ = 751871160. Its totient is φ = 200498968.

The previous prime is 400997929. The next prime is 400997953. The reversal of 400997944 is 449799004.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 400997894 and 400997903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25062364 + ... + 25062379.

It is an arithmetic number, because the mean of its divisors is an integer number (93983895).

Almost surely, 2^400997944 is an apocalyptic number.

It is an amenable number.

400997944 is a deficient number, since it is larger than the sum of its proper divisors (350873216).

400997944 is a wasteful number, since it uses less digits than its factorization.

400997944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50124749 (or 50124745 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 400997944 is about 20024.9330585648. The cubic root of 400997944 is about 737.4185337190.

The spelling of 400997944 in words is "four hundred million, nine hundred ninety-seven thousand, nine hundred forty-four".