977920 has 44 divisors (see below), whose sum is σ = 2358144. Its totient is φ = 389120.

The previous prime is 977897. The next prime is 977923. The reversal of 977920 is 29779.

It is a nialpdrome in base 16.

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 3 ways as a sum of consecutive naturals, for example, 5025 + ... + 5215.

2⁹⁷⁷⁹²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 977920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1179072).

977920 is an abundant number, since it is smaller than the sum of its proper divisors (1380224).

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

977920 is a wasteful number, since it uses less digits than its factorization.

977920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 977920 is about 988.8983769832. The cubic root of 977920 is about 99.2585155977.

The spelling of 977920 in words is "nine hundred seventy-seven thousand, nine hundred twenty".