724535644 has 48 divisors (see below), whose sum is σ = 1493775360. Its totient is φ = 301060800.

The previous prime is 724535633. The next prime is 724535659. The reversal of 724535644 is 446535427.

It is a junction number, because it is equal to n+sod(n) for n = 724535597 and 724535606.

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, 140919 + ... + 145969.

It is an arithmetic number, because the mean of its divisors is an integer number (31120320).

Almost surely, 2^724535644 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 724535644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (746887680).

724535644 is an abundant number, since it is smaller than the sum of its proper divisors (769239716).

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

724535644 is a wasteful number, since it uses less digits than its factorization.

724535644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5218 (or 5216 counting only the distinct ones).

The product of its digits is 403200, while the sum is 40.

The square root of 724535644 is about 26917.1997800663. The cubic root of 724535644 is about 898.1590533790.

The spelling of 724535644 in words is "seven hundred twenty-four million, five hundred thirty-five thousand, six hundred forty-four".