98991980 has 12 divisors (see below), whose sum is σ = 207883200. Its totient is φ = 39596784.

The previous prime is 98991973. The next prime is 98992001. The reversal of 98991980 is 8919989.

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, 2474780 + ... + 2474819.

It is an arithmetic number, because the mean of its divisors is an integer number (17323600).

Almost surely, 2^98991980 is an apocalyptic number.

It is an amenable number.

98991980 is an abundant number, since it is smaller than the sum of its proper divisors (108891220).

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

98991980 is a wasteful number, since it uses less digits than its factorization.

98991980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4949608 (or 4949606 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 53.

The square root of 98991980 is about 9949.4713427398. The cubic root of 98991980 is about 462.5940086478.

The spelling of 98991980 in words is "ninety-eight million, nine hundred ninety-one thousand, nine hundred eighty".