401972832040 has 32 divisors (see below), whose sum is σ = 974011094280. Its totient is φ = 148420737792.

The previous prime is 401972832011. The next prime is 401972832061. The reversal of 401972832040 is 40238279104.

It can be written as a sum of positive squares in 4 ways, for example, as 250074005476 + 151898826564 = 500074^2 + 389742^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 401972831984 and 401972832002.

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, 386511819 + ... + 386512858.

Almost surely, 2^401972832040 is an apocalyptic number.

401972832040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401972832040 is an abundant number, since it is smaller than the sum of its proper divisors (572038262240).

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

401972832040 is a wasteful number, since it uses less digits than its factorization.

401972832040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773024701 (or 773024697 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 401972832040 in words is "four hundred one billion, nine hundred seventy-two million, eight hundred thirty-two thousand, forty".