9799988 has 24 divisors (see below), whose sum is σ = 18978624. Its totient is φ = 4390400.

The previous prime is 9799987. The next prime is 9799997. The reversal of 9799988 is 8899979.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9799987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1556 + ... + 4692.

It is an arithmetic number, because the mean of its divisors is an integer number (790776).

Almost surely, 2^9799988 is an apocalyptic number.

It is an amenable number.

9799988 is a deficient number, since it is larger than the sum of its proper divisors (9178636).

9799988 is a wasteful number, since it uses less digits than its factorization.

9799988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223 (or 3221 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 59.

The square root of 9799988 is about 3130.4932518694. The cubic root of 9799988 is about 213.9974087671.

Subtracting from 9799988 its reverse (8899979), we obtain a palindrome (900009).

It can be divided in two parts, 9 and 799988, that added together give a palindrome (799997).

The spelling of 9799988 in words is "nine million, seven hundred ninety-nine thousand, nine hundred eighty-eight".