780996728 has 16 divisors (see below), whose sum is σ = 1550508480. Its totient is φ = 367527808.

The previous prime is 780996721. The next prime is 780996731. The reversal of 780996728 is 827699087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780996721) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2871176 + ... + 2871447.

It is an arithmetic number, because the mean of its divisors is an integer number (96906780).

Almost surely, 2^780996728 is an apocalyptic number.

It is an amenable number.

780996728 is a deficient number, since it is larger than the sum of its proper divisors (769511752).

780996728 is a wasteful number, since it uses less digits than its factorization.

780996728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5742646 (or 5742642 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 56.

The square root of 780996728 is about 27946.3186842203. The cubic root of 780996728 is about 920.9083372870.

The spelling of 780996728 in words is "seven hundred eighty million, nine hundred ninety-six thousand, seven hundred twenty-eight".