18498870 has 96 divisors (see below), whose sum is σ = 52651872. Its totient is φ = 4478976.

The previous prime is 18498863. The next prime is 18498937. The reversal of 18498870 is 7889481.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 113409 + ... + 113571.

It is an arithmetic number, because the mean of its divisors is an integer number (548457).

Almost surely, 2^18498870 is an apocalyptic number.

18498870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18498870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26325936).

18498870 is an abundant number, since it is smaller than the sum of its proper divisors (34153002).

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

18498870 is a wasteful number, since it uses less digits than its factorization.

18498870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 18498870 is about 4301.0312716836. The cubic root of 18498870 is about 264.4732386450.

The spelling of 18498870 in words is "eighteen million, four hundred ninety-eight thousand, eight hundred seventy".