9801988 has 24 divisors (see below), whose sum is σ = 19689152. Its totient is φ = 4182624.

The previous prime is 9801977. The next prime is 9801989. The reversal of 9801988 is 8891089.

It is a super-5 number, since 5×9801988⁵ (a number of 36 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (9801989) 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, 7306 + ... + 8542.

Almost surely, 2^9801988 is an apocalyptic number.

It is an amenable number.

9801988 is an abundant number, since it is smaller than the sum of its proper divisors (9887164).

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

9801988 is a wasteful number, since it uses less digits than its factorization.

9801988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531 (or 1529 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 43.

The square root of 9801988 is about 3130.8126740513. The cubic root of 9801988 is about 214.0119654415.

The spelling of 9801988 in words is "nine million, eight hundred one thousand, nine hundred eighty-eight".