8081138 has 16 divisors (see below), whose sum is σ = 13251840. Its totient is φ = 3673296.

The previous prime is 8081123. The next prime is 8081153. The reversal of 8081138 is 8311808.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8081123) and next prime (8081153).

It is a self number, because there is not a number n which added to its sum of digits gives 8081138.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578 + ... + 4061.

It is an arithmetic number, because the mean of its divisors is an integer number (828240).

Almost surely, 2^8081138 is an apocalyptic number.

8081138 is a deficient number, since it is larger than the sum of its proper divisors (5170702).

8081138 is a wasteful number, since it uses less digits than its factorization.

8081138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4721.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 8081138 is about 2842.7342471642. The cubic root of 8081138 is about 200.6738768995.

It can be divided in two parts, 80 and 81138, that added together give a palindrome (81218).

The spelling of 8081138 in words is "eight million, eighty-one thousand, one hundred thirty-eight".