9899072 has 28 divisors (see below), whose sum is σ = 19804380. Its totient is φ = 4909056.

The previous prime is 9899069. The next prime is 9899119. The reversal of 9899072 is 2709989.

It can be written as a sum of positive squares in 2 ways, for example, as 3013696 + 6885376 = 1736^2 + 2624^2 .

It is a super-2 number, since 2×9899072² = 195983252922368, which contains 22 as substring.

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, 8204 + ... + 9332.

Almost surely, 2^9899072 is an apocalyptic number.

It is an amenable number.

9899072 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

9899072 is a wasteful number, since it uses less digits than its factorization.

9899072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278 (or 1268 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 9899072 is about 3146.2790721740. The cubic root of 9899072 is about 214.7162075048.

The spelling of 9899072 in words is "nine million, eight hundred ninety-nine thousand, seventy-two".