18863828 has 12 divisors (see below), whose sum is σ = 33042240. Its totient is φ = 9423192.

The previous prime is 18863809. The next prime is 18863839. The reversal of 18863828 is 82836881.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6725 + ... + 9107.

It is an arithmetic number, because the mean of its divisors is an integer number (2753520).

Almost surely, 2^18863828 is an apocalyptic number.

It is an amenable number.

18863828 is a deficient number, since it is larger than the sum of its proper divisors (14178412).

18863828 is a wasteful number, since it uses less digits than its factorization.

18863828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366 (or 4364 counting only the distinct ones).

The product of its digits is 147456, while the sum is 44.

The square root of 18863828 is about 4343.2508562136. The cubic root of 18863828 is about 266.2011593868.

It can be divided in two parts, 18863 and 828, that added together give a palindrome (19691).

The spelling of 18863828 in words is "eighteen million, eight hundred sixty-three thousand, eight hundred twenty-eight".