3938278 has 8 divisors (see below), whose sum is σ = 5921568. Its totient is φ = 1964424.

The previous prime is 3938273. The next prime is 3938281. The reversal of 3938278 is 8728393.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3938278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3938273) 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 3 ways as a sum of consecutive naturals, for example, 1201 + ... + 3052.

It is an arithmetic number, because the mean of its divisors is an integer number (740196).

Almost surely, 2^3938278 is an apocalyptic number.

3938278 is a deficient number, since it is larger than the sum of its proper divisors (1983290).

3938278 is a wasteful number, since it uses less digits than its factorization.

3938278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4718.

The product of its digits is 72576, while the sum is 40.

The square root of 3938278 is about 1984.5095111891. The cubic root of 3938278 is about 157.9193895269.

The spelling of 3938278 in words is "three million, nine hundred thirty-eight thousand, two hundred seventy-eight".