720440920 has 32 divisors (see below), whose sum is σ = 1658693520. Its totient is φ = 281473920.

The previous prime is 720440887. The next prime is 720440933. The reversal of 720440920 is 29044027.

It is a congruent number.

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, 207711 + ... + 211150.

Almost surely, 2^720440920 is an apocalyptic number.

It is an amenable number.

720440920 is an abundant number, since it is smaller than the sum of its proper divisors (938252600).

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

720440920 is a wasteful number, since it uses less digits than its factorization.

720440920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418915 (or 418911 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 720440920 is about 26841.0305316320. The cubic root of 720440920 is about 896.4638694753.

Adding to 720440920 its reverse (29044027), we get a palindrome (749484947).

The spelling of 720440920 in words is "seven hundred twenty million, four hundred forty thousand, nine hundred twenty".