839428 has 6 divisors (see below), whose sum is σ = 1469006. Its totient is φ = 419712.

The previous prime is 839413. The next prime is 839429. The reversal of 839428 is 824938.

It can be written as a sum of positive squares in only one way, i.e., 777924 + 61504 = 882^2 + 248^2 .

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 839393 and 839402.

It is not an unprimeable number, because it can be changed into a prime (839429) by changing a digit.

839428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104925 + ... + 104932.

2⁸³⁹⁴²⁸ is an apocalyptic number.

It is an amenable number.

839428 is a deficient number, since it is larger than the sum of its proper divisors (629578).

839428 is a wasteful number, since it uses less digits than its factorization.

839428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209861 (or 209859 counting only the distinct ones).

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

The square root of 839428 is about 916.2030342670. The cubic root of 839428 is about 94.3324579102.

The spelling of 839428 in words is "eight hundred thirty-nine thousand, four hundred twenty-eight".