977128 has 16 divisors (see below), whose sum is σ = 1860480. Its totient is φ = 481008.

The previous prime is 977107. The next prime is 977147. The reversal of 977128 is 821779.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 977093 and 977102.

It is an unprimeable number.

977128 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, 376 + ... + 1447.

It is an arithmetic number, because the mean of its divisors is an integer number (116280).

2⁹⁷⁷¹²⁸ is an apocalyptic number.

It is an amenable number.

977128 is a deficient number, since it is larger than the sum of its proper divisors (883352).

977128 is a wasteful number, since it uses less digits than its factorization.

977128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896 (or 1892 counting only the distinct ones).

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

The square root of 977128 is about 988.4978502759. The cubic root of 977128 is about 99.2317124590.

It can be divided in two parts, 97 and 7128, that added together give a square (7225 = 85²).

The spelling of 977128 in words is "nine hundred seventy-seven thousand, one hundred twenty-eight".