400642324072 has 32 divisors (see below), whose sum is σ = 764218754280. Its totient is φ = 196856674560.

The previous prime is 400642324021. The next prime is 400642324157. The reversal of 400642324072 is 270423246004.

It can be written as a sum of positive squares in 4 ways, for example, as 315724867236 + 84917456836 = 561894^2 + 291406^2 .

It is a super-2 number, since 2×400642324072² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157818 + ... + 908950.

Almost surely, 2^400642324072 is an apocalyptic number.

It is an amenable number.

400642324072 is a deficient number, since it is larger than the sum of its proper divisors (363576430208).

400642324072 is a wasteful number, since it uses less digits than its factorization.

400642324072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752293 (or 752289 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 34.

The spelling of 400642324072 in words is "four hundred billion, six hundred forty-two million, three hundred twenty-four thousand, seventy-two".