18088140 has 48 divisors (see below), whose sum is σ = 57883392. Its totient is φ = 4134336.

The previous prime is 18088123. The next prime is 18088163. The reversal of 18088140 is 4188081.

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 = 18088098 and 18088107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21114 + ... + 21953.

It is an arithmetic number, because the mean of its divisors is an integer number (1205904).

Almost surely, 2^18088140 is an apocalyptic number.

18088140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18088140 is an abundant number, since it is smaller than the sum of its proper divisors (39795252).

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

18088140 is a wasteful number, since it uses less digits than its factorization.

18088140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43086 (or 43084 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 18088140 is about 4253.0154008656. The cubic root of 18088140 is about 262.5012063437.

The spelling of 18088140 in words is "eighteen million, eighty-eight thousand, one hundred forty".