3909918 has 16 divisors (see below), whose sum is σ = 7842816. Its totient is φ = 1299480.

The previous prime is 3909911. The next prime is 3909923. The reversal of 3909918 is 8199093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909911) 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 7 ways as a sum of consecutive naturals, for example, 1923 + ... + 3393.

It is an arithmetic number, because the mean of its divisors is an integer number (490176).

Almost surely, 2^3909918 is an apocalyptic number.

3909918 is an abundant number, since it is smaller than the sum of its proper divisors (3932898).

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

3909918 is a wasteful number, since it uses less digits than its factorization.

3909918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 3909918 is about 1977.3512586286. The cubic root of 3909918 is about 157.5394106465.

The spelling of 3909918 in words is "three million, nine hundred nine thousand, nine hundred eighteen".