18040768 has 14 divisors (see below), whose sum is σ = 35799776. Its totient is φ = 9020352.

The previous prime is 18040753. The next prime is 18040769. The reversal of 18040768 is 86704081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18040769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140880 + ... + 141007.

Almost surely, 2^18040768 is an apocalyptic number.

It is an amenable number.

18040768 is a deficient number, since it is larger than the sum of its proper divisors (17759008).

18040768 is an equidigital number, since it uses as much as digits as its factorization.

18040768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281899 (or 281889 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 18040768 is about 4247.4425246258. The cubic root of 18040768 is about 262.2718465032.

The spelling of 18040768 in words is "eighteen million, forty thousand, seven hundred sixty-eight".