7870138 has 8 divisors (see below), whose sum is σ = 11954880. Its totient is φ = 3885180.

The previous prime is 7870097. The next prime is 7870139. The reversal of 7870138 is 8310787.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (7870139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24748 + ... + 25063.

It is an arithmetic number, because the mean of its divisors is an integer number (1494360).

Almost surely, 2^7870138 is an apocalyptic number.

7870138 is a deficient number, since it is larger than the sum of its proper divisors (4084742).

7870138 is a wasteful number, since it uses less digits than its factorization.

7870138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49892.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 7870138 is about 2805.3766235570. The cubic root of 7870138 is about 198.9119076775.

It can be divided in two parts, 7870 and 138, that added together give a palindrome (8008).

The spelling of 7870138 in words is "seven million, eight hundred seventy thousand, one hundred thirty-eight".