7818132 has 48 divisors (see below), whose sum is σ = 21012992. Its totient is φ = 2216160.

The previous prime is 7818127. The next prime is 7818133. The reversal of 7818132 is 2318187.

It is a happy number.

It is a super-2 number, since 2×7818132² = 122246375938848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7818132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7818133) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 13407 + ... + 13977.

Almost surely, 2^7818132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7818132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10506496).

7818132 is an abundant number, since it is smaller than the sum of its proper divisors (13194860).

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

7818132 is a wasteful number, since it uses less digits than its factorization.

7818132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748 (or 746 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 7818132 is about 2796.0922731555. The cubic root of 7818132 is about 198.4728013374.

Subtracting from 7818132 its reverse (2318187), we obtain a palindrome (5499945).

The spelling of 7818132 in words is "seven million, eight hundred eighteen thousand, one hundred thirty-two".