4421918 has 4 divisors (see below), whose sum is σ = 6632880. Its totient is φ = 2210958.

The previous prime is 4421909. The next prime is 4421929. The reversal of 4421918 is 8191244.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105478 + ... + 1105481.

It is an arithmetic number, because the mean of its divisors is an integer number (1658220).

Almost surely, 2^4421918 is an apocalyptic number.

4421918 is a deficient number, since it is larger than the sum of its proper divisors (2210962).

4421918 is a wasteful number, since it uses less digits than its factorization.

4421918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210961.

The product of its digits is 2304, while the sum is 29.

The square root of 4421918 is about 2102.8357044715. The cubic root of 4421918 is about 164.1358927202.

The spelling of 4421918 in words is "four million, four hundred twenty-one thousand, nine hundred eighteen".