401618964 has 12 divisors (see below), whose sum is σ = 937110944. Its totient is φ = 133872984.

The previous prime is 401618957. The next prime is 401618993. The reversal of 401618964 is 469816104.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×401618964² = 322595584488866592, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 16734112 + ... + 16734135.

Almost surely, 2^401618964 is an apocalyptic number.

It is an amenable number.

401618964 is an abundant number, since it is smaller than the sum of its proper divisors (535491980).

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

401618964 is a wasteful number, since it uses less digits than its factorization.

401618964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33468254 (or 33468252 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 401618964 is about 20040.4332288501. The cubic root of 401618964 is about 737.7990140182.

The spelling of 401618964 in words is "four hundred one million, six hundred eighteen thousand, nine hundred sixty-four".