977720 has 16 divisors (see below), whose sum is σ = 2199960. Its totient is φ = 391072.

The previous prime is 977719. The next prime is 977723. The reversal of 977720 is 27779.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977723) 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, 12182 + ... + 12261.

2⁹⁷⁷⁷²⁰ is an apocalyptic number.

It is an amenable number.

977720 is an abundant number, since it is smaller than the sum of its proper divisors (1222240).

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

977720 is a wasteful number, since it uses less digits than its factorization.

977720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24454 (or 24450 counting only the distinct ones).

The product of its (nonzero) digits is 6174, while the sum is 32.

The square root of 977720 is about 988.7972491871. The cubic root of 977720 is about 99.2517484946.

The spelling of 977720 in words is "nine hundred seventy-seven thousand, seven hundred twenty".