1098500 has 48 divisors (see below), whose sum is σ = 2598960. Its totient is φ = 405600.

The previous prime is 1098481. The next prime is 1098509. The reversal of 1098500 is 58901.

1098500 = T₁₇₉ + T₁₈₀ + ... + T₂₃₀.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 8 ways, for example, as 1098304 + 196 = 1048^2 + 14^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84494 + ... + 84506.

It is an arithmetic number, because the mean of its divisors is an integer number (54145).

2^1098500 is an apocalyptic number.

1098500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1098500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1299480).

1098500 is an abundant number, since it is smaller than the sum of its proper divisors (1500460).

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

1098500 is an equidigital number, since it uses as much as digits as its factorization.

1098500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 20 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1098500 is about 1048.0935072788. The cubic root of 1098500 is about 103.1810683779.

The spelling of 1098500 in words is "one million, ninety-eight thousand, five hundred".