42339938 has 4 divisors (see below), whose sum is σ = 63509910. Its totient is φ = 21169968.

The previous prime is 42339937. The next prime is 42339943. The reversal of 42339938 is 83993324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 37173409 + 5166529 = 6097^2 + 2273^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42339895 and 42339904.

It is not an unprimeable number, because it can be changed into a prime (42339931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10584983 + ... + 10584986.

Almost surely, 2^42339938 is an apocalyptic number.

42339938 is a deficient number, since it is larger than the sum of its proper divisors (21169972).

42339938 is a wasteful number, since it uses less digits than its factorization.

42339938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21169971.

The product of its digits is 139968, while the sum is 41.

The square root of 42339938 is about 6506.9146298380. The cubic root of 42339938 is about 348.5379500838.

The spelling of 42339938 in words is "forty-two million, three hundred thirty-nine thousand, nine hundred thirty-eight".