401623656 has 32 divisors (see below), whose sum is σ = 1147496640. Its totient is φ = 114749568.

The previous prime is 401623627. The next prime is 401623709. The reversal of 401623656 is 656326104.

It is a super-2 number, since 2×401623656² = 322603122117612672, which contains 22 as substring.

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, 1195141 + ... + 1195476.

It is an arithmetic number, because the mean of its divisors is an integer number (35859270).

Almost surely, 2^401623656 is an apocalyptic number.

It is an amenable number.

401623656 is an abundant number, since it is smaller than the sum of its proper divisors (745872984).

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

401623656 is a wasteful number, since it uses less digits than its factorization.

401623656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390633 (or 2390629 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 401623656 is about 20040.5502918458. The cubic root of 401623656 is about 737.8018871723.

It can be divided in two parts, 4016 and 23656, that added together give a palindrome (27672).

The spelling of 401623656 in words is "four hundred one million, six hundred twenty-three thousand, six hundred fifty-six".