401956628 has 24 divisors (see below), whose sum is σ = 747381600. Its totient is φ = 188617248.

The previous prime is 401956627. The next prime is 401956657. The reversal of 401956628 is 826659104.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401956627) 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, 16583 + ... + 32846.

It is an arithmetic number, because the mean of its divisors is an integer number (31140900).

Almost surely, 2^401956628 is an apocalyptic number.

It is an amenable number.

401956628 is a deficient number, since it is larger than the sum of its proper divisors (345424972).

401956628 is a wasteful number, since it uses less digits than its factorization.

401956628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49559 (or 49557 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 401956628 is about 20048.8560272151. The cubic root of 401956628 is about 738.0057260201.

The spelling of 401956628 in words is "four hundred one million, nine hundred fifty-six thousand, six hundred twenty-eight".