401323656 has 16 divisors (see below), whose sum is σ = 1003309200. Its totient is φ = 133774544.

The previous prime is 401323651. The next prime is 401323669. The reversal of 401323656 is 656323104.

It is a super-2 number, since 2×401323656² = 322121353730412672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401323651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8360886 + ... + 8360933.

It is an arithmetic number, because the mean of its divisors is an integer number (62706825).

Almost surely, 2^401323656 is an apocalyptic number.

It is an amenable number.

401323656 is an abundant number, since it is smaller than the sum of its proper divisors (601985544).

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

401323656 is a wasteful number, since it uses less digits than its factorization.

401323656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16721828 (or 16721824 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 401323656 is about 20033.0640691832. The cubic root of 401323656 is about 737.6181366244.

The spelling of 401323656 in words is "four hundred one million, three hundred twenty-three thousand, six hundred fifty-six".