998172516 has 24 divisors (see below), whose sum is σ = 2540803104. Its totient is φ = 302476480.

The previous prime is 998172509. The next prime is 998172517. The reversal of 998172516 is 615271899.

It is not an unprimeable number, because it can be changed into a prime (998172517) 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, 3780825 + ... + 3781088.

It is an arithmetic number, because the mean of its divisors is an integer number (105866796).

Almost surely, 2^998172516 is an apocalyptic number.

It is an amenable number.

998172516 is an abundant number, since it is smaller than the sum of its proper divisors (1542630588).

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

998172516 is a wasteful number, since it uses less digits than its factorization.

998172516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7561931 (or 7561929 counting only the distinct ones).

The product of its digits is 272160, while the sum is 48.

The square root of 998172516 is about 31593.8683291553. The cubic root of 998172516 is about 999.3904672119.

The spelling of 998172516 in words is "nine hundred ninety-eight million, one hundred seventy-two thousand, five hundred sixteen".