723712536 has 64 divisors (see below), whose sum is σ = 2022451200. Its totient is φ = 239781024.

The previous prime is 723712529. The next prime is 723712553. The reversal of 723712536 is 635217327.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 723712536.

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, 26041 + ... + 46103.

It is an arithmetic number, because the mean of its divisors is an integer number (31600800).

Almost surely, 2^723712536 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 723712536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1011225600).

723712536 is an abundant number, since it is smaller than the sum of its proper divisors (1298738664).

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

723712536 is a wasteful number, since it uses less digits than its factorization.

723712536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20245 (or 20235 counting only the distinct ones).

The product of its digits is 52920, while the sum is 36.

The square root of 723712536 is about 26901.9058060949. The cubic root of 723712536 is about 897.8188069336.

The spelling of 723712536 in words is "seven hundred twenty-three million, seven hundred twelve thousand, five hundred thirty-six".