3940842 has 16 divisors (see below), whose sum is σ = 7907040. Its totient is φ = 1309392.

The previous prime is 3940841. The next prime is 3940891. The reversal of 3940842 is 2480493.

It is a happy number.

3940842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3940841) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1408 + ... + 3140.

It is an arithmetic number, because the mean of its divisors is an integer number (494190).

Almost surely, 2^3940842 is an apocalyptic number.

3940842 is an abundant number, since it is smaller than the sum of its proper divisors (3966198).

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

3940842 is a wasteful number, since it uses less digits than its factorization.

3940842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 3940842 is about 1985.1554095335. The cubic root of 3940842 is about 157.9536530194.

The spelling of 3940842 in words is "three million, nine hundred forty thousand, eight hundred forty-two".