4090891 has 8 divisors (see below), whose sum is σ = 4784384. Its totient is φ = 3424680.

The previous prime is 4090861. The next prime is 4090901. The reversal of 4090891 is 1980904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4090891 - 2⁵ = 4090859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4090841) 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, 6495 + ... + 7096.

It is an arithmetic number, because the mean of its divisors is an integer number (598048).

Almost surely, 2^4090891 is an apocalyptic number.

4090891 is a deficient number, since it is larger than the sum of its proper divisors (693493).

4090891 is a wasteful number, since it uses less digits than its factorization.

4090891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13641.

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

The square root of 4090891 is about 2022.5951151924. The cubic root of 4090891 is about 159.9334488848.

The spelling of 4090891 in words is "four million, ninety thousand, eight hundred ninety-one".