401338188 has 18 divisors (see below), whose sum is σ = 1014493844. Its totient is φ = 133779384.

The previous prime is 401338187. The next prime is 401338213. The reversal of 401338188 is 881833104.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×401338188² = 322144682294246688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 11148283 = 401338188 / (4 + 0 + 1 + 3 + 3 + 8 + 1 + 8 + 8).

It is not an unprimeable number, because it can be changed into a prime (401338181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5574106 + ... + 5574177.

Almost surely, 2^401338188 is an apocalyptic number.

It is an amenable number.

401338188 is an abundant number, since it is smaller than the sum of its proper divisors (613155656).

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

401338188 is a wasteful number, since it uses less digits than its factorization.

401338188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11148293 (or 11148288 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 401338188 is about 20033.4267662824. The cubic root of 401338188 is about 737.6270396110.

The spelling of 401338188 in words is "four hundred one million, three hundred thirty-eight thousand, one hundred eighty-eight".