998307258 has 64 divisors (see below), whose sum is σ = 2228446080. Its totient is φ = 296195328.

The previous prime is 998307257. The next prime is 998307263. The reversal of 998307258 is 852703899.

It is a self number, because there is not a number n which added to its sum of digits gives 998307258.

It is not an unprimeable number, because it can be changed into a prime (998307257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241860 + ... + 245952.

It is an arithmetic number, because the mean of its divisors is an integer number (34819470).

Almost surely, 2^998307258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998307258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1114223040).

998307258 is an abundant number, since it is smaller than the sum of its proper divisors (1230138822).

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

998307258 is a wasteful number, since it uses less digits than its factorization.

998307258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4223.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 998307258 is about 31596.0006646411. Note that the first 3 decimals coincide. The cubic root of 998307258 is about 999.4354339919.

The spelling of 998307258 in words is "nine hundred ninety-eight million, three hundred seven thousand, two hundred fifty-eight".