9902844 has 48 divisors (see below), whose sum is σ = 29344000. Its totient is φ = 2829168.

The previous prime is 9902839. The next prime is 9902861. The reversal of 9902844 is 4482099.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 9902799 and 9902808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5794 + ... + 7305.

Almost surely, 2^9902844 is an apocalyptic number.

It is an amenable number.

9902844 is an abundant number, since it is smaller than the sum of its proper divisors (19441156).

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

9902844 is a wasteful number, since it uses less digits than its factorization.

9902844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13119 (or 13111 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 9902844 is about 3146.8784533248. The cubic root of 9902844 is about 214.7434762793.

The spelling of 9902844 in words is "nine million, nine hundred two thousand, eight hundred forty-four".