721482536 has 16 divisors (see below), whose sum is σ = 1389341940. Its totient is φ = 350991360.

The previous prime is 721482529. The next prime is 721482539. The reversal of 721482536 is 635284127.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 660798436 + 60684100 = 25706^2 + 7790^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 721482536.

It is not an unprimeable number, because it can be changed into a prime (721482539) 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, 1218425 + ... + 1219016.

Almost surely, 2^721482536 is an apocalyptic number.

It is an amenable number.

721482536 is a deficient number, since it is larger than the sum of its proper divisors (667859404).

721482536 is a wasteful number, since it uses less digits than its factorization.

721482536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437484 (or 2437480 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 721482536 is about 26860.4269511860. The cubic root of 721482536 is about 896.8956982941.

The spelling of 721482536 in words is "seven hundred twenty-one million, four hundred eighty-two thousand, five hundred thirty-six".