779728 has 10 divisors (see below), whose sum is σ = 1510754. Its totient is φ = 389856.

The previous prime is 779707. The next prime is 779731. The reversal of 779728 is 827977.

It can be written as a sum of positive squares in only one way, i.e., 725904 + 53824 = 852^2 + 232^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24351 + ... + 24382.

2⁷⁷⁹⁷²⁸ is an apocalyptic number.

It is an amenable number.

779728 is a deficient number, since it is larger than the sum of its proper divisors (731026).

779728 is a wasteful number, since it uses less digits than its factorization.

779728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48741 (or 48735 counting only the distinct ones).

The product of its digits is 49392, while the sum is 40.

The square root of 779728 is about 883.0220835291. The cubic root of 779728 is about 92.0409395614.

It can be divided in two parts, 7 and 79728, that multiplied together give a triangular number (558096 = T₁₀₅₆).

The spelling of 779728 in words is "seven hundred seventy-nine thousand, seven hundred twenty-eight".