18040896 has 42 divisors (see below), whose sum is σ = 51712622. Its totient is φ = 6013440.

The previous prime is 18040879. The next prime is 18040907. The reversal of 18040896 is 69804081.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15681600 + 2359296 = 3960^2 + 1536^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18040896.

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 5 ways as a sum of consecutive naturals, for example, 15085 + ... + 16236.

Almost surely, 2^18040896 is an apocalyptic number.

18040896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18040896 is an abundant number, since it is smaller than the sum of its proper divisors (33671726).

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

18040896 is a wasteful number, since it uses less digits than its factorization.

18040896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31339 (or 31326 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18040896 is about 4247.4575924899. The cubic root of 18040896 is about 262.2724667783.

The spelling of 18040896 in words is "eighteen million, forty thousand, eight hundred ninety-six".