720918532 has 24 divisors (see below), whose sum is σ = 1317427776. Its totient is φ = 344533728.

The previous prime is 720918493. The next prime is 720918553. The reversal of 720918532 is 235819027.

It is a junction number, because it is equal to n+sod(n) for n = 720918491 and 720918500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200898 + ... + 204454.

It is an arithmetic number, because the mean of its divisors is an integer number (54892824).

Almost surely, 2^720918532 is an apocalyptic number.

It is an amenable number.

720918532 is a deficient number, since it is larger than the sum of its proper divisors (596509244).

720918532 is a wasteful number, since it uses less digits than its factorization.

720918532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5787 (or 5785 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 720918532 is about 26849.9261079058. The cubic root of 720918532 is about 896.6619275019.

The spelling of 720918532 in words is "seven hundred twenty million, nine hundred eighteen thousand, five hundred thirty-two".