18028313 has 8 divisors (see below), whose sum is σ = 19141920. Its totient is φ = 16920640.

The previous prime is 18028303. The next prime is 18028319. The reversal of 18028313 is 31382081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18028313 - 2⁸ = 18028057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18028319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5858 + ... + 8388.

It is an arithmetic number, because the mean of its divisors is an integer number (2392740).

Almost surely, 2^18028313 is an apocalyptic number.

It is an amenable number.

18028313 is a deficient number, since it is larger than the sum of its proper divisors (1113607).

18028313 is a wasteful number, since it uses less digits than its factorization.

18028313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18028313 is about 4245.9760950811. The cubic root of 18028313 is about 262.2114767919.

The spelling of 18028313 in words is "eighteen million, twenty-eight thousand, three hundred thirteen".