1098258 has 32 divisors (see below), whose sum is σ = 2549760. Its totient is φ = 308880.

The previous prime is 1098233. The next prime is 1098269. The reversal of 1098258 is 8528901.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3153 + ... + 3483.

It is an arithmetic number, because the mean of its divisors is an integer number (79680).

2^1098258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1098258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1274880).

1098258 is an abundant number, since it is smaller than the sum of its proper divisors (1451502).

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

1098258 is a wasteful number, since it uses less digits than its factorization.

1098258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 1098258 is about 1047.9780532053. The cubic root of 1098258 is about 103.1734908776.

The spelling of 1098258 in words is "one million, ninety-eight thousand, two hundred fifty-eight".