720318904 has 8 divisors (see below), whose sum is σ = 1350597960. Its totient is φ = 360159448.

The previous prime is 720318901. The next prime is 720318913. The reversal of 720318904 is 409813027.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×720318904² = 1037718646919522432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 720318904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720318901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45019924 + ... + 45019939.

It is an arithmetic number, because the mean of its divisors is an integer number (168824745).

Almost surely, 2^720318904 is an apocalyptic number.

It is an amenable number.

720318904 is a deficient number, since it is larger than the sum of its proper divisors (630279056).

720318904 is a wasteful number, since it uses less digits than its factorization.

720318904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90039869 (or 90039865 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 720318904 is about 26838.7574973209. The cubic root of 720318904 is about 896.4132573626.

The spelling of 720318904 in words is "seven hundred twenty million, three hundred eighteen thousand, nine hundred four".