998265918 has 64 divisors (see below), whose sum is σ = 2286144000. Its totient is φ = 288233088.

The previous prime is 998265901. The next prime is 998265923. The reversal of 998265918 is 819562899.

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, 89833 + ... + 100331.

It is an arithmetic number, because the mean of its divisors is an integer number (35721000).

Almost surely, 2^998265918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998265918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1143072000).

998265918 is an abundant number, since it is smaller than the sum of its proper divisors (1287878082).

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

998265918 is a wasteful number, since it uses less digits than its factorization.

998265918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10593.

The product of its digits is 2799360, while the sum is 57.

The square root of 998265918 is about 31595.3464611484. The cubic root of 998265918 is about 999.4216382288.

The spelling of 998265918 in words is "nine hundred ninety-eight million, two hundred sixty-five thousand, nine hundred eighteen".