42439256 has 16 divisors (see below), whose sum is σ = 80695440. Its totient is φ = 20920480.

The previous prime is 42439249. The next prime is 42439307. The reversal of 42439256 is 65293424.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36791 + ... + 37926.

It is an arithmetic number, because the mean of its divisors is an integer number (5043465).

Almost surely, 2^42439256 is an apocalyptic number.

It is an amenable number.

42439256 is a deficient number, since it is larger than the sum of its proper divisors (38256184).

42439256 is a wasteful number, since it uses less digits than its factorization.

42439256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74794 (or 74790 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 42439256 is about 6514.5418871936. The cubic root of 42439256 is about 348.8102624074.

The spelling of 42439256 in words is "forty-two million, four hundred thirty-nine thousand, two hundred fifty-six".