401971928 has 32 divisors (see below), whose sum is σ = 773886960. Its totient is φ = 195661440.

The previous prime is 401971909. The next prime is 401971939. The reversal of 401971928 is 829179104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51926 + ... + 59162.

Almost surely, 2^401971928 is an apocalyptic number.

It is an amenable number.

401971928 is a deficient number, since it is larger than the sum of its proper divisors (371915032).

401971928 is a wasteful number, since it uses less digits than its factorization.

401971928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7427 (or 7423 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 401971928 is about 20049.2375914896. The cubic root of 401971928 is about 738.0150896707.

The spelling of 401971928 in words is "four hundred one million, nine hundred seventy-one thousand, nine hundred twenty-eight".