401139984 has 40 divisors (see below), whose sum is σ = 1184319040. Its totient is φ = 114611328.

The previous prime is 401139979. The next prime is 401140001. The reversal of 401139984 is 489931104.

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, 596599 + ... + 597270.

It is an arithmetic number, because the mean of its divisors is an integer number (29607976).

Almost surely, 2^401139984 is an apocalyptic number.

It is an amenable number.

401139984 is an abundant number, since it is smaller than the sum of its proper divisors (783179056).

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

401139984 is a wasteful number, since it uses less digits than its factorization.

401139984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193887 (or 1193881 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 401139984 is about 20028.4793232037. The cubic root of 401139984 is about 737.5055919905.

The spelling of 401139984 in words is "four hundred one million, one hundred thirty-nine thousand, nine hundred eighty-four".