18040326 has 32 divisors (see below), whose sum is σ = 38873088. Its totient is φ = 5565120.

The previous prime is 18040277. The next prime is 18040327. The reversal of 18040326 is 62304081.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18040296 and 18040305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18040327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2170 + ... + 6386.

It is an arithmetic number, because the mean of its divisors is an integer number (1214784).

Almost surely, 2^18040326 is an apocalyptic number.

18040326 is an abundant number, since it is smaller than the sum of its proper divisors (20832762).

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

18040326 is a wasteful number, since it uses less digits than its factorization.

18040326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4276.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 18040326 is about 4247.3904929968. The cubic root of 18040326 is about 262.2697045932.

The spelling of 18040326 in words is "eighteen million, forty thousand, three hundred twenty-six".