977980 has 24 divisors (see below), whose sum is σ = 2077488. Its totient is φ = 386688.

The previous prime is 977971. The next prime is 978001. The reversal of 977980 is 89779.

It is a congruent number.

It is an unprimeable number.

977980 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 7 ways as a sum of consecutive naturals, for example, 1912 + ... + 2368.

It is an arithmetic number, because the mean of its divisors is an integer number (86562).

2⁹⁷⁷⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

977980 is an abundant number, since it is smaller than the sum of its proper divisors (1099508).

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

977980 is a wasteful number, since it uses less digits than its factorization.

977980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 977980 is about 988.9287133055. The cubic root of 977980 is about 99.2605455488.

The spelling of 977980 in words is "nine hundred seventy-seven thousand, nine hundred eighty".