401591984 has 10 divisors (see below), whose sum is σ = 778084500. Its totient is φ = 200795984.

The previous prime is 401591977. The next prime is 401592031. The reversal of 401591984 is 489195104.

It is a super-2 number, since 2×401591984² = 322552243226112512, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12549734 + ... + 12549765.

It is an arithmetic number, because the mean of its divisors is an integer number (77808450).

Almost surely, 2^401591984 is an apocalyptic number.

It is an amenable number.

401591984 is a deficient number, since it is larger than the sum of its proper divisors (376492516).

401591984 is a wasteful number, since it uses less digits than its factorization.

401591984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25099507 (or 25099501 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 401591984 is about 20039.7600784041. The cubic root of 401591984 is about 737.7824923356.

The spelling of 401591984 in words is "four hundred one million, five hundred ninety-one thousand, nine hundred eighty-four".