720673900 has 18 divisors (see below), whose sum is σ = 1563862580. Its totient is φ = 288269520.

The previous prime is 720673897. The next prime is 720673907. The reversal of 720673900 is 9376027.

It is not an unprimeable number, because it can be changed into a prime (720673907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3603270 + ... + 3603469.

Almost surely, 2^720673900 is an apocalyptic number.

It is an amenable number.

720673900 is an abundant number, since it is smaller than the sum of its proper divisors (843188680).

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

720673900 is a wasteful number, since it uses less digits than its factorization.

720673900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7206753 (or 7206746 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 720673900 is about 26845.3701781145. The cubic root of 720673900 is about 896.5604934717.

The spelling of 720673900 in words is "seven hundred twenty million, six hundred seventy-three thousand, nine hundred".