18123828 has 12 divisors (see below), whose sum is σ = 42288960. Its totient is φ = 6041272.

The previous prime is 18123817. The next prime is 18123829. The reversal of 18123828 is 82832181.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18123829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755148 + ... + 755171.

It is an arithmetic number, because the mean of its divisors is an integer number (3524080).

Almost surely, 2^18123828 is an apocalyptic number.

It is an amenable number.

18123828 is an abundant number, since it is smaller than the sum of its proper divisors (24165132).

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

18123828 is a wasteful number, since it uses less digits than its factorization.

18123828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510326 (or 1510324 counting only the distinct ones).

The product of its digits is 6144, while the sum is 33.

The square root of 18123828 is about 4257.2089448370. The cubic root of 18123828 is about 262.6737317049.

The spelling of 18123828 in words is "eighteen million, one hundred twenty-three thousand, eight hundred twenty-eight".