97998890 has 32 divisors (see below), whose sum is σ = 195321024. Its totient is φ = 35101440.

The previous prime is 97998871. The next prime is 97998893. The reversal of 97998890 is 9889979.

It is not an unprimeable number, because it can be changed into a prime (97998893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722 + ... + 14018.

It is an arithmetic number, because the mean of its divisors is an integer number (6103782).

Almost surely, 2^97998890 is an apocalyptic number.

97998890 is a deficient number, since it is larger than the sum of its proper divisors (97322134).

97998890 is a wasteful number, since it uses less digits than its factorization.

97998890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13382.

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

The square root of 97998890 is about 9899.4388729867. The cubic root of 97998890 is about 461.0418885243.

The spelling of 97998890 in words is "ninety-seven million, nine hundred ninety-eight thousand, eight hundred ninety".