720522532 has 12 divisors (see below), whose sum is σ = 1270540656. Its totient is φ = 357510920.

The previous prime is 720522529. The next prime is 720522599. The reversal of 720522532 is 235225027.

It is a self number, because there is not a number n which added to its sum of digits gives 720522532.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686998 + ... + 688045.

It is an arithmetic number, because the mean of its divisors is an integer number (105878388).

Almost surely, 2^720522532 is an apocalyptic number.

It is an amenable number.

720522532 is a deficient number, since it is larger than the sum of its proper divisors (550018124).

720522532 is a wasteful number, since it uses less digits than its factorization.

720522532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375178 (or 1375176 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 720522532 is about 26842.5507729798. The cubic root of 720522532 is about 896.4977188606.

Adding to 720522532 its reverse (235225027), we get a palindrome (955747559).

The spelling of 720522532 in words is "seven hundred twenty million, five hundred twenty-two thousand, five hundred thirty-two".