8139028 has 6 divisors (see below), whose sum is σ = 14243306. Its totient is φ = 4069512.

The previous prime is 8139017. The next prime is 8139031. The reversal of 8139028 is 8209318.

It can be written as a sum of positive squares in only one way, i.e., 4210704 + 3928324 = 2052^2 + 1982^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1017375 + ... + 1017382.

Almost surely, 2^8139028 is an apocalyptic number.

It is an amenable number.

8139028 is a deficient number, since it is larger than the sum of its proper divisors (6104278).

8139028 is a wasteful number, since it uses less digits than its factorization.

8139028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034761 (or 2034759 counting only the distinct ones).

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

The square root of 8139028 is about 2852.8981755401. The cubic root of 8139028 is about 201.1519193383.

It can be divided in two parts, 81390 and 28, that added together give a palindrome (81418).

The spelling of 8139028 in words is "eight million, one hundred thirty-nine thousand, twenty-eight".