787638720 has 112 divisors (see below), whose sum is σ = 2728130688. Its totient is φ = 190940160.

The previous prime is 787638707. The next prime is 787638727. The reversal of 787638720 is 27836787.

787638720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 787638720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787638727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26734 + ... + 47853.

Almost surely, 2^787638720 is an apocalyptic number.

It is an amenable number.

787638720 is an abundant number, since it is smaller than the sum of its proper divisors (1940491968).

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

787638720 is a wasteful number, since it uses less digits than its factorization.

787638720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74618 (or 74608 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 48.

The square root of 787638720 is about 28064.9019239334. The cubic root of 787638720 is about 923.5115951122.

The spelling of 787638720 in words is "seven hundred eighty-seven million, six hundred thirty-eight thousand, seven hundred twenty".