839742 has 16 divisors (see below), whose sum is σ = 1691280. Its totient is φ = 277952.

The previous prime is 839731. The next prime is 839767. The reversal of 839742 is 247938.

839742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

839742 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 in 7 ways as a sum of consecutive naturals, for example, 634 + ... + 1442.

It is an arithmetic number, because the mean of its divisors is an integer number (105705).

2⁸³⁹⁷⁴² is an apocalyptic number.

839742 is an abundant number, since it is smaller than the sum of its proper divisors (851538).

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

839742 is a wasteful number, since it uses less digits than its factorization.

839742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987.

The product of its digits is 12096, while the sum is 33.

The square root of 839742 is about 916.3743776427. The cubic root of 839742 is about 94.3442185771.

The spelling of 839742 in words is "eight hundred thirty-nine thousand, seven hundred forty-two".