4091868 has 36 divisors (see below), whose sum is σ = 11284728. Its totient is φ = 1239840.

The previous prime is 4091863. The next prime is 4091873. The reversal of 4091868 is 8681904.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4091863) and next prime (4091873).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 4771 + ... + 5562.

Almost surely, 2^4091868 is an apocalyptic number.

It is an amenable number.

4091868 is an abundant number, since it is smaller than the sum of its proper divisors (7192860).

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

4091868 is a wasteful number, since it uses less digits than its factorization.

4091868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10354 (or 10349 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 4091868 is about 2022.8366221719. The cubic root of 4091868 is about 159.9461798149.

Adding to 4091868 its sum of digits (36), we get a palindrome (4091904).

The spelling of 4091868 in words is "four million, ninety-one thousand, eight hundred sixty-eight".