780975056 has 20 divisors (see below), whose sum is σ = 1513577604. Its totient is φ = 390374400.

The previous prime is 780975047. The next prime is 780975059. The reversal of 780975056 is 650579087.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 123565456 + 657409600 = 11116^2 + 25640^2 .

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 780975056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780975059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91616 + ... + 99776.

Almost surely, 2^780975056 is an apocalyptic number.

It is an amenable number.

780975056 is a deficient number, since it is larger than the sum of its proper divisors (732602548).

780975056 is a wasteful number, since it uses less digits than its factorization.

780975056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14150 (or 14144 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 780975056 is about 27945.9309381527. The cubic root of 780975056 is about 920.8998190652.

The spelling of 780975056 in words is "seven hundred eighty million, nine hundred seventy-five thousand, fifty-six".