401890188 has 48 divisors (see below), whose sum is σ = 1073286144. Its totient is φ = 114656640.

The previous prime is 401890171. The next prime is 401890213. The reversal of 401890188 is 881098104.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 60781 + ... + 67067.

It is an arithmetic number, because the mean of its divisors is an integer number (22360128).

Almost surely, 2^401890188 is an apocalyptic number.

It is an amenable number.

401890188 is an abundant number, since it is smaller than the sum of its proper divisors (671395956).

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

401890188 is a wasteful number, since it uses less digits than its factorization.

401890188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7062 (or 7060 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 401890188 is about 20047.1990063450. The cubic root of 401890188 is about 737.9650617636.

The spelling of 401890188 in words is "four hundred one million, eight hundred ninety thousand, one hundred eighty-eight".