9898558990 has 64 divisors (see below), whose sum is σ = 18763799040. Its totient is φ = 3752496000.

The previous prime is 9898558981. The next prime is 9898559017. The reversal of 9898558990 is 998558989.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15990901 + ... + 15991519.

It is an arithmetic number, because the mean of its divisors is an integer number (293184360).

Almost surely, 2^9898558990 is an apocalyptic number.

9898558990 is a deficient number, since it is larger than the sum of its proper divisors (8865240050).

9898558990 is a wasteful number, since it uses less digits than its factorization.

9898558990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177.

The product of its (nonzero) digits is 83980800, while the sum is 70.

The square root of 9898558990 is about 99491.5020994256. The cubic root of 9898558990 is about 2147.1249828626.

The spelling of 9898558990 in words is "nine billion, eight hundred ninety-eight million, five hundred fifty-eight thousand, nine hundred ninety".