4090918 has 16 divisors (see below), whose sum is σ = 6896736. Its totient is φ = 1805760.

The previous prime is 4090913. The next prime is 4090921. The reversal of 4090918 is 8190904.

It is a super-2 number, since 2×4090918² = 33471220165448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4090918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4090913) 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, 2823 + ... + 4018.

It is an arithmetic number, because the mean of its divisors is an integer number (431046).

Almost surely, 2^4090918 is an apocalyptic number.

4090918 is a deficient number, since it is larger than the sum of its proper divisors (2805818).

4090918 is a wasteful number, since it uses less digits than its factorization.

4090918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6879.

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

The square root of 4090918 is about 2022.6017897747. The cubic root of 4090918 is about 159.9338007391.

The spelling of 4090918 in words is "four million, ninety thousand, nine hundred eighteen".