9977976 has 48 divisors (see below), whose sum is σ = 27245400. Its totient is φ = 3298752.

The previous prime is 9977971. The next prime is 9977977. The reversal of 9977976 is 6797799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9510 + ... + 10506.

Almost surely, 2^9977976 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 9977976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13622700).

9977976 is an abundant number, since it is smaller than the sum of its proper divisors (17267424).

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

9977976 is a wasteful number, since it uses less digits than its factorization.

9977976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148 (or 1141 counting only the distinct ones).

The product of its digits is 1500282, while the sum is 54.

The square root of 9977976 is about 3158.7934405402. The cubic root of 9977976 is about 215.2851885152.

The spelling of 9977976 in words is "nine million, nine hundred seventy-seven thousand, nine hundred seventy-six".