779864 has 16 divisors (see below), whose sum is σ = 1483920. Its totient is φ = 384160.

The previous prime is 779837. The next prime is 779869. The reversal of 779864 is 468977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779869) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 119 + ... + 1254.

It is an arithmetic number, because the mean of its divisors is an integer number (92745).

2⁷⁷⁹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

779864 is a deficient number, since it is larger than the sum of its proper divisors (704056).

779864 is a wasteful number, since it uses less digits than its factorization.

779864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450 (or 1446 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 779864 is about 883.0990884380. The cubic root of 779864 is about 92.0462905043.

It can be divided in two parts, 77 and 9864, that multiplied together give a triangular number (759528 = T₁₂₃₂).

The spelling of 779864 in words is "seven hundred seventy-nine thousand, eight hundred sixty-four".