9979800 has 48 divisors (see below), whose sum is σ = 30939240. Its totient is φ = 2661120.

The previous prime is 9979789. The next prime is 9979811. The reversal of 9979800 is 89799.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9979789) and next prime (9979811).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7717 + ... + 8916.

Almost surely, 2^9979800 is an apocalyptic number.

It is an amenable number.

9979800 is an abundant number, since it is smaller than the sum of its proper divisors (20959440).

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

9979800 is a wasteful number, since it uses less digits than its factorization.

9979800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16652 (or 16643 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 9979800 is about 3159.0821451808. The cubic root of 9979800 is about 215.2983059470.

The spelling of 9979800 in words is "nine million, nine hundred seventy-nine thousand, eight hundred".