782080864 has 12 divisors (see below), whose sum is σ = 1539721764. Its totient is φ = 391040416.

The previous prime is 782080837. The next prime is 782080867. The reversal of 782080864 is 468080287.

It is a super-2 number, since 2×782080864² = 1223300955669972992, 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 782080864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (782080867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12219982 + ... + 12220045.

It is an arithmetic number, because the mean of its divisors is an integer number (128310147).

Almost surely, 2^782080864 is an apocalyptic number.

It is an amenable number.

782080864 is a deficient number, since it is larger than the sum of its proper divisors (757640900).

782080864 is a wasteful number, since it uses less digits than its factorization.

782080864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24440037 (or 24440029 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 782080864 is about 27965.7087162117. The cubic root of 782080864 is about 921.3342580929.

The spelling of 782080864 in words is "seven hundred eighty-two million, eighty thousand, eight hundred sixty-four".