7381836 has 72 divisors (see below), whose sum is σ = 23272704. Its totient is φ = 1916640.

The previous prime is 7381831. The next prime is 7381837. The reversal of 7381836 is 6381837.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 7381836.

It is not an unprimeable number, because it can be changed into a prime (7381831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1441 + ... + 4103.

It is an arithmetic number, because the mean of its divisors is an integer number (323232).

Almost surely, 2^7381836 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 7381836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11636352).

7381836 is an abundant number, since it is smaller than the sum of its proper divisors (15890868).

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

7381836 is a wasteful number, since it uses less digits than its factorization.

7381836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691 (or 2686 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 7381836 is about 2716.9534408966. The cubic root of 7381836 is about 194.7099435173.

Subtracting from 7381836 its reverse (6381837), we obtain a palindrome (999999).

The spelling of 7381836 in words is "seven million, three hundred eighty-one thousand, eight hundred thirty-six".