771928 has 16 divisors (see below), whose sum is σ = 1478880. Its totient is φ = 377568.

The previous prime is 771917. The next prime is 771937. The reversal of 771928 is 829177.

It is a junction number, because it is equal to n+sod(n) for n = 771893 and 771902.

It is a congruent number.

It is an unprimeable number.

771928 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 in 3 ways as a sum of consecutive naturals, for example, 651 + ... + 1402.

It is an arithmetic number, because the mean of its divisors is an integer number (92430).

2⁷⁷¹⁹²⁸ is an apocalyptic number.

It is an amenable number.

771928 is a deficient number, since it is larger than the sum of its proper divisors (706952).

771928 is a wasteful number, since it uses less digits than its factorization.

771928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106 (or 2102 counting only the distinct ones).

The product of its digits is 7056, while the sum is 34.

The square root of 771928 is about 878.5943318734. The cubic root of 771928 is about 91.7330002880.

The spelling of 771928 in words is "seven hundred seventy-one thousand, nine hundred twenty-eight".