401657922 has 12 divisors (see below), whose sum is σ = 870258870. Its totient is φ = 133885968.

The previous prime is 401657909. The next prime is 401657933. The reversal of 401657922 is 229756104.

It can be written as a sum of positive squares in only one way, i.e., 390023001 + 11634921 = 19749^2 + 3411^2 .

It is a super-2 number, since 2×401657922² = 322658172610716168, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11157147 + ... + 11157182.

Almost surely, 2^401657922 is an apocalyptic number.

401657922 is an abundant number, since it is smaller than the sum of its proper divisors (468600948).

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

401657922 is a wasteful number, since it uses less digits than its factorization.

401657922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22314337 (or 22314334 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 401657922 is about 20041.4051902555. The cubic root of 401657922 is about 737.8228693365.

The spelling of 401657922 in words is "four hundred one million, six hundred fifty-seven thousand, nine hundred twenty-two".