720646938 has 24 divisors (see below), whose sum is σ = 1703347776. Its totient is φ = 218377800.

The previous prime is 720646931. The next prime is 720646951. The reversal of 720646938 is 839646027.

720646938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 720646893 and 720646902.

It is not an unprimeable number, because it can be changed into a prime (720646931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1819618 + ... + 1820013.

It is an arithmetic number, because the mean of its divisors is an integer number (70972824).

Almost surely, 2^720646938 is an apocalyptic number.

720646938 is an abundant number, since it is smaller than the sum of its proper divisors (982700838).

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

720646938 is a wasteful number, since it uses less digits than its factorization.

720646938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3639650 (or 3639647 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 720646938 is about 26844.8680011655. The cubic root of 720646938 is about 896.5493125638.

The spelling of 720646938 in words is "seven hundred twenty million, six hundred forty-six thousand, nine hundred thirty-eight".