9902646 has 48 divisors (see below), whose sum is σ = 23390640. Its totient is φ = 3009600.

The previous prime is 9902621. The next prime is 9902663. The reversal of 9902646 is 6462099.

9902646 is a `hidden beast` number, since 9 + 9 + 0 + 2 + 646 = 666.

9902646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9902646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23425 + ... + 23843.

It is an arithmetic number, because the mean of its divisors is an integer number (487305).

Almost surely, 2^9902646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9902646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11695320).

9902646 is an abundant number, since it is smaller than the sum of its proper divisors (13487994).

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

9902646 is a wasteful number, since it uses less digits than its factorization.

9902646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 9902646 is about 3146.8469934206. The cubic root of 9902646 is about 214.7420450577.

The spelling of 9902646 in words is "nine million, nine hundred two thousand, six hundred forty-six".