780085647 has 48 divisors (see below), whose sum is σ = 1349816832. Its totient is φ = 444942720.

The previous prime is 780085637. The next prime is 780085667. The reversal of 780085647 is 746580087.

780085647 is a `hidden beast` number, since 7 + 80 + 0 + 8 + 564 + 7 = 666.

It is not a de Polignac number, because 780085647 - 2⁸ = 780085391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780085627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36858 + ... + 54024.

It is an arithmetic number, because the mean of its divisors is an integer number (28121184).

Almost surely, 2^780085647 is an apocalyptic number.

780085647 is a deficient number, since it is larger than the sum of its proper divisors (569731185).

780085647 is a wasteful number, since it uses less digits than its factorization.

780085647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17210 (or 17198 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 780085647 is about 27930.0133727143. The cubic root of 780085647 is about 920.5500990992.

The spelling of 780085647 in words is "seven hundred eighty million, eighty-five thousand, six hundred forty-seven".