42748839 has 12 divisors (see below), whose sum is σ = 70569616. Its totient is φ = 24427872.

The previous prime is 42748817. The next prime is 42748843. The reversal of 42748839 is 93884724.

42748839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42748839 - 2⁵ = 42748807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42748794 and 42748803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42748859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339214 + ... + 339339.

Almost surely, 2^42748839 is an apocalyptic number.

42748839 is a deficient number, since it is larger than the sum of its proper divisors (27820777).

42748839 is a wasteful number, since it uses less digits than its factorization.

42748839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678566 (or 678563 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 42748839 is about 6538.2596308192. The cubic root of 42748839 is about 349.6563674915.

The spelling of 42748839 in words is "forty-two million, seven hundred forty-eight thousand, eight hundred thirty-nine".