3905994 has 32 divisors (see below), whose sum is σ = 8118144. Its totient is φ = 1252160.

The previous prime is 3905987. The next prime is 3905999. The reversal of 3905994 is 4995093.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3905999) 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 15 ways as a sum of consecutive naturals, for example, 22492 + ... + 22664.

It is an arithmetic number, because the mean of its divisors is an integer number (253692).

Almost surely, 2^3905994 is an apocalyptic number.

3905994 is an abundant number, since it is smaller than the sum of its proper divisors (4212150).

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

3905994 is a wasteful number, since it uses less digits than its factorization.

3905994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 3905994 is about 1976.3587730976. The cubic root of 3905994 is about 157.4866907373.

The spelling of 3905994 in words is "three million, nine hundred five thousand, nine hundred ninety-four".