18105428 has 24 divisors (see below), whose sum is σ = 34673184. Its totient is φ = 8204000.

The previous prime is 18105421. The next prime is 18105433. The reversal of 18105428 is 82450181.

It is a self number, because there is not a number n which added to its sum of digits gives 18105428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18105421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25478 + ... + 26178.

It is an arithmetic number, because the mean of its divisors is an integer number (1444716).

Almost surely, 2^18105428 is an apocalyptic number.

It is an amenable number.

18105428 is a deficient number, since it is larger than the sum of its proper divisors (16567756).

18105428 is a wasteful number, since it uses less digits than its factorization.

18105428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 18105428 is about 4255.0473557882. The cubic root of 18105428 is about 262.5848094823.

The spelling of 18105428 in words is "eighteen million, one hundred five thousand, four hundred twenty-eight".