18040088 has 32 divisors (see below), whose sum is σ = 38178000. Its totient is φ = 7916160.

The previous prime is 18040081. The next prime is 18040129. The reversal of 18040088 is 88004081.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 18040088.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18040081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 983 + ... + 6086.

Almost surely, 2^18040088 is an apocalyptic number.

It is an amenable number.

18040088 is an abundant number, since it is smaller than the sum of its proper divisors (20137912).

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

18040088 is a wasteful number, since it uses less digits than its factorization.

18040088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7115 (or 7111 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 18040088 is about 4247.3624757018. The cubic root of 18040088 is about 262.2685512426.

The spelling of 18040088 in words is "eighteen million, forty thousand, eighty-eight".