720535940 has 12 divisors (see below), whose sum is σ = 1513125516. Its totient is φ = 288214368.

The previous prime is 720535913. The next prime is 720535961. The reversal of 720535940 is 49535027.

It can be written as a sum of positive squares in 2 ways, for example, as 317409856 + 403126084 = 17816^2 + 20078^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 720535940.

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, 18013379 + ... + 18013418.

It is an arithmetic number, because the mean of its divisors is an integer number (126093793).

Almost surely, 2^720535940 is an apocalyptic number.

It is an amenable number.

720535940 is an abundant number, since it is smaller than the sum of its proper divisors (792589576).

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

720535940 is a wasteful number, since it uses less digits than its factorization.

720535940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36026806 (or 36026804 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 720535940 is about 26842.8005245354. The cubic root of 720535940 is about 896.5032797170.

The spelling of 720535940 in words is "seven hundred twenty million, five hundred thirty-five thousand, nine hundred forty".