4090305 has 16 divisors (see below), whose sum is σ = 6770880. Its totient is φ = 2106048.

The previous prime is 4090279. The next prime is 4090309. The reversal of 4090305 is 5030904.

It is not a de Polignac number, because 4090305 - 2⁶ = 4090241 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4090309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4267 + ... + 5136.

It is an arithmetic number, because the mean of its divisors is an integer number (423180).

Almost surely, 2^4090305 is an apocalyptic number.

It is an amenable number.

4090305 is a deficient number, since it is larger than the sum of its proper divisors (2680575).

4090305 is a wasteful number, since it uses less digits than its factorization.

4090305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9440.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 4090305 is about 2022.4502466068. The cubic root of 4090305 is about 159.9258119603.

The spelling of 4090305 in words is "four million, ninety thousand, three hundred five".