771128 has 16 divisors (see below), whose sum is σ = 1481760. Its totient is φ = 376000.

The previous prime is 771109. The next prime is 771143. The reversal of 771128 is 821177.

It is a junction number, because it is equal to n+sod(n) for n = 771097 and 771106.

It is a congruent number.

It is an unprimeable number.

771128 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848 + ... + 1503.

It is an arithmetic number, because the mean of its divisors is an integer number (92610).

2⁷⁷¹¹²⁸ is an apocalyptic number.

It is an amenable number.

771128 is a deficient number, since it is larger than the sum of its proper divisors (710632).

771128 is a wasteful number, since it uses less digits than its factorization.

771128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398 (or 2394 counting only the distinct ones).

The product of its digits is 784, while the sum is 26.

The square root of 771128 is about 878.1389411705. The cubic root of 771128 is about 91.7012996775.

The spelling of 771128 in words is "seven hundred seventy-one thousand, one hundred twenty-eight".