9979644 has 48 divisors (see below), whose sum is σ = 24335360. Its totient is φ = 3179520.

The previous prime is 9979643. The next prime is 9979681. The reversal of 9979644 is 4469799.

9979644 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 9979593 and 9979602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9979643) 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, 51612 + ... + 51804.

Almost surely, 2^9979644 is an apocalyptic number.

It is an amenable number.

9979644 is an abundant number, since it is smaller than the sum of its proper divisors (14355716).

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

9979644 is a wasteful number, since it uses less digits than its factorization.

9979644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 368 counting only the distinct ones).

The product of its digits is 489888, while the sum is 48.

The square root of 9979644 is about 3159.0574543683. The cubic root of 9979644 is about 215.2971841239.

The spelling of 9979644 in words is "nine million, nine hundred seventy-nine thousand, six hundred forty-four".