720378636 has 24 divisors (see below), whose sum is σ = 1684777584. Its totient is φ = 239569920.

The previous prime is 720378629. The next prime is 720378767. The reversal of 720378636 is 636873027.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64125 + ... + 74516.

It is an arithmetic number, because the mean of its divisors is an integer number (70199066).

Almost surely, 2^720378636 is an apocalyptic number.

It is an amenable number.

720378636 is an abundant number, since it is smaller than the sum of its proper divisors (964398948).

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

720378636 is a wasteful number, since it uses less digits than its factorization.

720378636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139081 (or 139079 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 42.

The square root of 720378636 is about 26839.8702679428. The cubic root of 720378636 is about 896.4380348495.

The spelling of 720378636 in words is "seven hundred twenty million, three hundred seventy-eight thousand, six hundred thirty-six".