998689450 has 24 divisors (see below), whose sum is σ = 2026432800. Its totient is φ = 363159600.

The previous prime is 998689409. The next prime is 998689453. The reversal of 998689450 is 54986899.

It is not an unprimeable number, because it can be changed into a prime (998689453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 907350 + ... + 908449.

It is an arithmetic number, because the mean of its divisors is an integer number (84434700).

Almost surely, 2^998689450 is an apocalyptic number.

998689450 is an abundant number, since it is smaller than the sum of its proper divisors (1027743350).

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

998689450 is a wasteful number, since it uses less digits than its factorization.

998689450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815822 (or 1815817 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 58.

The square root of 998689450 is about 31602.0481931156. The cubic root of 998689450 is about 999.5629590230.

The spelling of 998689450 in words is "nine hundred ninety-eight million, six hundred eighty-nine thousand, four hundred fifty".