9902224 has 20 divisors (see below), whose sum is σ = 19848060. Its totient is φ = 4780160.

The previous prime is 9902219. The next prime is 9902239. The reversal of 9902224 is 4222099.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8294400 + 1607824 = 2880^2 + 1268^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9902192 and 9902201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10207 + ... + 11134.

It is an arithmetic number, because the mean of its divisors is an integer number (992403).

Almost surely, 2^9902224 is an apocalyptic number.

It is an amenable number.

9902224 is an abundant number, since it is smaller than the sum of its proper divisors (9945836).

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

9902224 is a wasteful number, since it uses less digits than its factorization.

9902224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21378 (or 21372 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 9902224 is about 3146.7799414640. The cubic root of 9902224 is about 214.7389946127.

The spelling of 9902224 in words is "nine million, nine hundred two thousand, two hundred twenty-four".