9977880 has 64 divisors (see below), whose sum is σ = 32659200. Its totient is φ = 2418560.

The previous prime is 9977873. The next prime is 9977881. The reversal of 9977880 is 887799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2460 + ... + 5099.

It is an arithmetic number, because the mean of its divisors is an integer number (510300).

Almost surely, 2^9977880 is an apocalyptic number.

It is an amenable number.

9977880 is an abundant number, since it is smaller than the sum of its proper divisors (22681320).

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

9977880 is a wasteful number, since it uses less digits than its factorization.

9977880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7584 (or 7580 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 9977880 is about 3158.7782448282. The cubic root of 9977880 is about 215.2844980798.

The spelling of 9977880 in words is "nine million, nine hundred seventy-seven thousand, eight hundred eighty".