724407439868 has 24 divisors (see below), whose sum is σ = 1498774015200. Its totient is φ = 299754802368.

The previous prime is 724407439853. The next prime is 724407439879. The reversal of 724407439868 is 868934704427.

It is a happy number.

It is a super-2 number, since 2×724407439868² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 724407439868.

It is a congruent number.

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, 446062883 + ... + 446064506.

It is an arithmetic number, because the mean of its divisors is an integer number (62448917300).

Almost surely, 2^724407439868 is an apocalyptic number.

It is an amenable number.

724407439868 is an abundant number, since it is smaller than the sum of its proper divisors (774366575332).

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

724407439868 is a wasteful number, since it uses less digits than its factorization.

724407439868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892127429 (or 892127427 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 62.

The spelling of 724407439868 in words is "seven hundred twenty-four billion, four hundred seven million, four hundred thirty-nine thousand, eight hundred sixty-eight".