39942378 has 24 divisors (see below), whose sum is σ = 98905248. Its totient is φ = 11412072.

The previous prime is 39942361. The next prime is 39942379. The reversal of 39942378 is 87324993.

It is a happy number.

39942378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39942379) 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, 158376 + ... + 158627.

It is an arithmetic number, because the mean of its divisors is an integer number (4121052).

Almost surely, 2^39942378 is an apocalyptic number.

39942378 is an abundant number, since it is smaller than the sum of its proper divisors (58962870).

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

39942378 is a wasteful number, since it uses less digits than its factorization.

39942378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317018 (or 317015 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 39942378 is about 6319.9982594934. The cubic root of 39942378 is about 341.8308900263.

The spelling of 39942378 in words is "thirty-nine million, nine hundred forty-two thousand, three hundred seventy-eight".