4491864 has 48 divisors (see below), whose sum is σ = 13104000. Its totient is φ = 1381824.

The previous prime is 4491841. The next prime is 4491871. The reversal of 4491864 is 4681944.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1464 + ... + 3335.

It is an arithmetic number, because the mean of its divisors is an integer number (273000).

Almost surely, 2^4491864 is an apocalyptic number.

It is an amenable number.

4491864 is an abundant number, since it is smaller than the sum of its proper divisors (8612136).

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

4491864 is a wasteful number, since it uses less digits than its factorization.

4491864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4824 (or 4817 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 4491864 is about 2119.4018023961. The cubic root of 4491864 is about 164.9968043458.

The spelling of 4491864 in words is "four million, four hundred ninety-one thousand, eight hundred sixty-four".