779628728 has 16 divisors (see below), whose sum is σ = 1489385880. Its totient is φ = 382459168.

The previous prime is 779628727. The next prime is 779628737. The reversal of 779628728 is 827826977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779628727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918950 + ... + 919797.

Almost surely, 2^779628728 is an apocalyptic number.

It is an amenable number.

779628728 is a deficient number, since it is larger than the sum of its proper divisors (709757152).

779628728 is a wasteful number, since it uses less digits than its factorization.

779628728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838806 (or 1838802 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 56.

The square root of 779628728 is about 27921.8324613554. The cubic root of 779628728 is about 920.3703329493.

The spelling of 779628728 in words is "seven hundred seventy-nine million, six hundred twenty-eight thousand, seven hundred twenty-eight".