723630920 has 16 divisors (see below), whose sum is σ = 1628169660. Its totient is φ = 289452352.

The previous prime is 723630893. The next prime is 723630931. The reversal of 723630920 is 29036327.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 647906116 + 75724804 = 25454^2 + 8702^2 .

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, 9045347 + ... + 9045426.

Almost surely, 2^723630920 is an apocalyptic number.

It is an amenable number.

723630920 is an abundant number, since it is smaller than the sum of its proper divisors (904538740).

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

723630920 is a wasteful number, since it uses less digits than its factorization.

723630920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18090784 (or 18090780 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 723630920 is about 26900.3888447732. The cubic root of 723630920 is about 897.7850554412.

The spelling of 723630920 in words is "seven hundred twenty-three million, six hundred thirty thousand, nine hundred twenty".