13789818 has 48 divisors (see below), whose sum is σ = 35206080. Its totient is φ = 3919320.

The previous prime is 13789793. The next prime is 13789837. The reversal of 13789818 is 81898731.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72103 + ... + 72293.

It is an arithmetic number, because the mean of its divisors is an integer number (733460).

Almost surely, 2^13789818 is an apocalyptic number.

13789818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13789818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17603040).

13789818 is an abundant number, since it is smaller than the sum of its proper divisors (21416262).

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

13789818 is an equidigital number, since it uses as much as digits as its factorization.

13789818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 203 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 13789818 is about 3713.4644201877. The cubic root of 13789818 is about 239.8020242349.

Multiplying 13789818 by its product of digits (96768), we get a square (1334413108224 = 1155168²).

The spelling of 13789818 in words is "thirteen million, seven hundred eighty-nine thousand, eight hundred eighteen".