977928 has 32 divisors (see below), whose sum is σ = 2794560. Its totient is φ = 279360.

The previous prime is 977927. The next prime is 977971. The reversal of 977928 is 829779.

977928 is nontrivially palindromic in base 11.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 977928.

It is not an unprimeable number, because it can be changed into a prime (977923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2743 + ... + 3078.

It is an arithmetic number, because the mean of its divisors is an integer number (87330).

2⁹⁷⁷⁹²⁸ is an apocalyptic number.

It is an amenable number.

977928 is an abundant number, since it is smaller than the sum of its proper divisors (1816632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

977928 is a wasteful number, since it uses less digits than its factorization.

977928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5837 (or 5833 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The square root of 977928 is about 988.9024218799. The cubic root of 977928 is about 99.2587862627.

The spelling of 977928 in words is "nine hundred seventy-seven thousand, nine hundred twenty-eight".