4391966 has 8 divisors (see below), whose sum is σ = 6656160. Its totient is φ = 2173248.

The previous prime is 4391957. The next prime is 4391969. The reversal of 4391966 is 6691934.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4391969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11126 + ... + 11513.

It is an arithmetic number, because the mean of its divisors is an integer number (832020).

Almost surely, 2^4391966 is an apocalyptic number.

4391966 is a deficient number, since it is larger than the sum of its proper divisors (2264194).

4391966 is a wasteful number, since it uses less digits than its factorization.

4391966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22738.

The product of its digits is 34992, while the sum is 38.

The square root of 4391966 is about 2095.7017917633. The cubic root of 4391966 is about 163.7644596131.

Subtracting 4391966 from its reverse (6691934), we obtain a cube (2299968 = 132³).

The spelling of 4391966 in words is "four million, three hundred ninety-one thousand, nine hundred sixty-six".