18098040 has 64 divisors (see below), whose sum is σ = 55128960. Its totient is φ = 4752000.

The previous prime is 18098021. The next prime is 18098071. The reversal of 18098040 is 4089081.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18097989 and 18098007.

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 15 ways as a sum of consecutive naturals, for example, 6915 + ... + 9165.

It is an arithmetic number, because the mean of its divisors is an integer number (861390).

Almost surely, 2^18098040 is an apocalyptic number.

18098040 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 18098040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27564480).

18098040 is an abundant number, since it is smaller than the sum of its proper divisors (37030920).

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

18098040 is a wasteful number, since it uses less digits than its factorization.

18098040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332 (or 2328 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 18098040 is about 4254.1791217578. The cubic root of 18098040 is about 262.5490883254.

The spelling of 18098040 in words is "eighteen million, ninety-eight thousand, forty".