18102798 has 64 divisors (see below), whose sum is σ = 46609920. Its totient is φ = 5101056.

The previous prime is 18102779. The next prime is 18102811. The reversal of 18102798 is 89720181.

It is a super-2 number, since 2×18102798² = 655422590857608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31086 + ... + 31662.

It is an arithmetic number, because the mean of its divisors is an integer number (728280).

Almost surely, 2^18102798 is an apocalyptic number.

18102798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18102798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23304960).

18102798 is an abundant number, since it is smaller than the sum of its proper divisors (28507122).

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

18102798 is a wasteful number, since it uses less digits than its factorization.

18102798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 18102798 is about 4254.7382998253. The cubic root of 18102798 is about 262.5720944835.

The spelling of 18102798 in words is "eighteen million, one hundred two thousand, seven hundred ninety-eight".