998591592 has 128 divisors (see below), whose sum is σ = 2650152960. Its totient is φ = 313148160.

The previous prime is 998591591. The next prime is 998591639. The reversal of 998591592 is 295195899.

It is a super-2 number, since 2×998591592² = 1994370335226188928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (998591591) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6360378 + ... + 6360534.

It is an arithmetic number, because the mean of its divisors is an integer number (20704320).

Almost surely, 2^998591592 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998591592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325076480).

998591592 is an abundant number, since it is smaller than the sum of its proper divisors (1651561368).

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

998591592 is a wasteful number, since it uses less digits than its factorization.

998591592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 379 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 57.

The square root of 998591592 is about 31600.4998694641. The cubic root of 998591592 is about 999.5303100926.

The spelling of 998591592 in words is "nine hundred ninety-eight million, five hundred ninety-one thousand, five hundred ninety-two".