4223891 has 8 divisors (see below), whose sum is σ = 4844544. Its totient is φ = 3607560.

The previous prime is 4223873. The next prime is 4223897. The reversal of 4223891 is 1983224.

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

It is a cyclic number.

It is not a de Polignac number, because 4223891 - 2²² = 29587 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 4² + 2¹⁴ + 2²² + 3⁸ + 8² + 9⁴ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4223897) 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, 1406 + ... + 3228.

It is an arithmetic number, because the mean of its divisors is an integer number (605568).

Almost surely, 2^4223891 is an apocalyptic number.

4223891 is a deficient number, since it is larger than the sum of its proper divisors (620653).

4223891 is a wasteful number, since it uses less digits than its factorization.

4223891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161.

The product of its digits is 3456, while the sum is 29.

The square root of 4223891 is about 2055.2106947951. The cubic root of 4223891 is about 161.6482103610.

The spelling of 4223891 in words is "four million, two hundred twenty-three thousand, eight hundred ninety-one".