8039428 has 6 divisors (see below), whose sum is σ = 14069006. Its totient is φ = 4019712.

The previous prime is 8039393. The next prime is 8039431. The reversal of 8039428 is 8249308.

It can be written as a sum of positive squares in only one way, i.e., 6594624 + 1444804 = 2568^2 + 1202^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8039393 and 8039402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004925 + ... + 1004932.

Almost surely, 2^8039428 is an apocalyptic number.

It is an amenable number.

8039428 is a deficient number, since it is larger than the sum of its proper divisors (6029578).

8039428 is a wasteful number, since it uses less digits than its factorization.

8039428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009861 (or 2009859 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 8039428 is about 2835.3885095345. The cubic root of 8039428 is about 200.3280283595.

The spelling of 8039428 in words is "eight million, thirty-nine thousand, four hundred twenty-eight".