8028139 has 4 divisors (see below), whose sum is σ = 9175024. Its totient is φ = 6881256.

The previous prime is 8028121. The next prime is 8028151. The reversal of 8028139 is 9318208.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8028139 - 2⁵ = 8028107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8028139.

It is not an unprimeable number, because it can be changed into a prime (8028109) 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, 573432 + ... + 573445.

It is an arithmetic number, because the mean of its divisors is an integer number (2293756).

Almost surely, 2^8028139 is an apocalyptic number.

8028139 is a deficient number, since it is larger than the sum of its proper divisors (1146885).

8028139 is a wasteful number, since it uses less digits than its factorization.

8028139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146884.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 8028139 is about 2833.3970777143. The cubic root of 8028139 is about 200.2342172709.

The spelling of 8028139 in words is "eight million, twenty-eight thousand, one hundred thirty-nine".