3940278 has 16 divisors (see below), whose sum is σ = 8094000. Its totient is φ = 1277856.

The previous prime is 3940273. The next prime is 3940289. The reversal of 3940278 is 8720493.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3940271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8653 + ... + 9096.

It is an arithmetic number, because the mean of its divisors is an integer number (505875).

Almost surely, 2^3940278 is an apocalyptic number.

3940278 is an abundant number, since it is smaller than the sum of its proper divisors (4153722).

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

3940278 is a wasteful number, since it uses less digits than its factorization.

3940278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17791.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 3940278 is about 1985.0133500811. The cubic root of 3940278 is about 157.9461173954.

The spelling of 3940278 in words is "three million, nine hundred forty thousand, two hundred seventy-eight".