8139144 has 64 divisors (see below), whose sum is σ = 23083200. Its totient is φ = 2370816.

The previous prime is 8139137. The next prime is 8139151. The reversal of 8139144 is 4419318.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8139137) and next prime (8139151).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5242 + ... + 6614.

It is an arithmetic number, because the mean of its divisors is an integer number (360675).

Almost surely, 2^8139144 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 8139144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11541600).

8139144 is an abundant number, since it is smaller than the sum of its proper divisors (14944056).

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

8139144 is a wasteful number, since it uses less digits than its factorization.

8139144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414 (or 1410 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 8139144 is about 2852.9185056710. The cubic root of 8139144 is about 201.1528749607.

The spelling of 8139144 in words is "eight million, one hundred thirty-nine thousand, one hundred forty-four".