4009918 has 16 divisors (see below), whose sum is σ = 6623856. Its totient is φ = 1805440.

The previous prime is 4009913. The next prime is 4009919. The reversal of 4009918 is 8199004.

It is a self number, because there is not a number n which added to its sum of digits gives 4009918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4009913) 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, 1680 + ... + 3292.

It is an arithmetic number, because the mean of its divisors is an integer number (413991).

Almost surely, 2^4009918 is an apocalyptic number.

4009918 is a deficient number, since it is larger than the sum of its proper divisors (2613938).

4009918 is a wasteful number, since it uses less digits than its factorization.

4009918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 4009918 is about 2002.4779649225. The cubic root of 4009918 is about 158.8711956072.

The spelling of 4009918 in words is "four million, nine thousand, nine hundred eighteen".