998955660 has 48 divisors (see below), whose sum is σ = 2849859936. Its totient is φ = 261361152.

The previous prime is 998955641. The next prime is 998955667. The reversal of 998955660 is 66559899.

It is a self number, because there is not a number n which added to its sum of digits gives 998955660.

It is not an unprimeable number, because it can be changed into a prime (998955667) 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, 153889 + ... + 160248.

It is an arithmetic number, because the mean of its divisors is an integer number (59372082).

Almost surely, 2^998955660 is an apocalyptic number.

It is an amenable number.

998955660 is an abundant number, since it is smaller than the sum of its proper divisors (1850904276).

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

998955660 is a wasteful number, since it uses less digits than its factorization.

998955660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314202 (or 314200 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 57.

The square root of 998955660 is about 31606.2598230161. The cubic root of 998955660 is about 999.6517654134.

The spelling of 998955660 in words is "nine hundred ninety-eight million, nine hundred fifty-five thousand, six hundred sixty".