4091904 has 104 divisors (see below), whose sum is σ = 12450320. Its totient is φ = 1327104.

The previous prime is 4091873. The next prime is 4091909.

4091904 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4091909) 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, 110574 + ... + 110610.

Almost surely, 2^4091904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4091904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6225160).

4091904 is an abundant number, since it is smaller than the sum of its proper divisors (8358416).

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

4091904 is an equidigital number, since it uses as much as digits as its factorization.

4091904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 4091904 is about 2022.8455205477. The cubic root of 4091904 is about 159.9466488790.

The spelling of 4091904 in words is "four million, ninety-one thousand, nine hundred four".