401972831984 has 20 divisors (see below), whose sum is σ = 788680875360. Its totient is φ = 198442283520.

The previous prime is 401972831971. The next prime is 401972831989. The reversal of 401972831984 is 489138279104.

It is a happy number.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401972831989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159006977 + ... + 159009504.

It is an arithmetic number, because the mean of its divisors is an integer number (39434043768).

Almost surely, 2^401972831984 is an apocalyptic number.

It is an amenable number.

401972831984 is a deficient number, since it is larger than the sum of its proper divisors (386708043376).

401972831984 is a wasteful number, since it uses less digits than its factorization.

401972831984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318016568 (or 318016562 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 401972831984 in words is "four hundred one billion, nine hundred seventy-two million, eight hundred thirty-one thousand, nine hundred eighty-four".