4091864 has 32 divisors (see below), whose sum is σ = 8877600. Its totient is φ = 1731840.

The previous prime is 4091863. The next prime is 4091873. The reversal of 4091864 is 4681904.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4091864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4091863) 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, 4574 + ... + 5394.

It is an arithmetic number, because the mean of its divisors is an integer number (277425).

Almost surely, 2^4091864 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 4091864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4438800).

4091864 is an abundant number, since it is smaller than the sum of its proper divisors (4785736).

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

4091864 is a wasteful number, since it uses less digits than its factorization.

4091864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 4091864 is about 2022.8356334611. The cubic root of 4091864 is about 159.9461276965.

The spelling of 4091864 in words is "four million, ninety-one thousand, eight hundred sixty-four".