18498240 has 112 divisors (see below), whose sum is σ = 65288160. Its totient is φ = 4930560.

The previous prime is 18498209. The next prime is 18498241. The reversal of 18498240 is 4289481.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18498195 and 18498204.

It is not an unprimeable number, because it can be changed into a prime (18498241) 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, 7570 + ... + 9710.

It is an arithmetic number, because the mean of its divisors is an integer number (582930).

Almost surely, 2^18498240 is an apocalyptic number.

18498240 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 18498240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32644080).

18498240 is an abundant number, since it is smaller than the sum of its proper divisors (46789920).

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

18498240 is a wasteful number, since it uses less digits than its factorization.

18498240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167 (or 2151 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 18498240 is about 4300.9580328108. The cubic root of 18498240 is about 264.4702362989.

The spelling of 18498240 in words is "eighteen million, four hundred ninety-eight thousand, two hundred forty".