724022639872 has 144 divisors (see below), whose sum is σ = 1701259136640. Its totient is φ = 301029433344.

The previous prime is 724022639801. The next prime is 724022639881. The reversal of 724022639872 is 278936220427.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22991754 + ... + 23023222.

It is an arithmetic number, because the mean of its divisors is an integer number (11814299560).

Almost surely, 2^724022639872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 724022639872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850629568320).

724022639872 is an abundant number, since it is smaller than the sum of its proper divisors (977236496768).

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

724022639872 is a wasteful number, since it uses less digits than its factorization.

724022639872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31876 (or 31862 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 724022639872 in words is "seven hundred twenty-four billion, twenty-two million, six hundred thirty-nine thousand, eight hundred seventy-two".