18628284 has 24 divisors (see below), whose sum is σ = 45754240. Its totient is φ = 5882544.

The previous prime is 18628283. The next prime is 18628289. The reversal of 18628284 is 48282681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18628283) 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, 40624 + ... + 41079.

Almost surely, 2^18628284 is an apocalyptic number.

It is an amenable number.

18628284 is an abundant number, since it is smaller than the sum of its proper divisors (27125956).

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

18628284 is a wasteful number, since it uses less digits than its factorization.

18628284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81729 (or 81727 counting only the distinct ones).

The product of its digits is 49152, while the sum is 39.

The square root of 18628284 is about 4316.0495826624. The cubic root of 18628284 is about 265.0885381146.

The spelling of 18628284 in words is "eighteen million, six hundred twenty-eight thousand, two hundred eighty-four".