18068388 has 24 divisors (see below), whose sum is σ = 45403008. Its totient is φ = 5559456.

The previous prime is 18068377. The next prime is 18068419. The reversal of 18068388 is 88386081.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57756 + ... + 58067.

It is an arithmetic number, because the mean of its divisors is an integer number (1891792).

Almost surely, 2^18068388 is an apocalyptic number.

It is an amenable number.

18068388 is an abundant number, since it is smaller than the sum of its proper divisors (27334620).

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

18068388 is a wasteful number, since it uses less digits than its factorization.

18068388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115843 (or 115841 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 18068388 is about 4250.6926494396. The cubic root of 18068388 is about 262.4056223079.

The spelling of 18068388 in words is "eighteen million, sixty-eight thousand, three hundred eighty-eight".