722536 has 16 divisors (see below), whose sum is σ = 1391940. Its totient is φ = 351360.

The previous prime is 722521. The next prime is 722537. The reversal of 722536 is 635227.

It can be written as a sum of positive squares in 2 ways, for example, as 722500 + 36 = 850^2 + 6^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 722536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 925 + ... + 1516.

2⁷²²⁵³⁶ is an apocalyptic number.

It is an amenable number.

722536 is a deficient number, since it is larger than the sum of its proper divisors (669404).

722536 is a wasteful number, since it uses less digits than its factorization.

722536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484 (or 2480 counting only the distinct ones).

The product of its digits is 2520, while the sum is 25.

The square root of 722536 is about 850.0211762068. The cubic root of 722536 is about 89.7332016471.

It can be divided in two parts, 7225 and 36, that multiplied together give a square (260100 = 510²).

The spelling of 722536 in words is "seven hundred twenty-two thousand, five hundred thirty-six".