776728 has 16 divisors (see below), whose sum is σ = 1476000. Its totient is φ = 383136.

The previous prime is 776719. The next prime is 776729. The reversal of 776728 is 827677.

776728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776729) 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, 18 + ... + 1246.

It is an arithmetic number, because the mean of its divisors is an integer number (92250).

2⁷⁷⁶⁷²⁸ is an apocalyptic number.

It is an amenable number.

776728 is a deficient number, since it is larger than the sum of its proper divisors (699272).

776728 is a wasteful number, since it uses less digits than its factorization.

776728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314 (or 1310 counting only the distinct ones).

The product of its digits is 32928, while the sum is 37.

The square root of 776728 is about 881.3217346690. The cubic root of 776728 is about 91.9227454797.

The spelling of 776728 in words is "seven hundred seventy-six thousand, seven hundred twenty-eight".