4428668191 has 4 divisors (see below), whose sum is σ = 4429138032. Its totient is φ = 4428198352.

The previous prime is 4428668183. The next prime is 4428668203. The reversal of 4428668191 is 1918668244.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4428668191 - 2³ = 4428668183 is a prime.

It is a super-2 number, since 2×4428668191² = 39226203891950424962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4428668161) 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, 220486 + ... + 239731.

It is an arithmetic number, because the mean of its divisors is an integer number (1107284508).

Almost surely, 2^4428668191 is an apocalyptic number.

4428668191 is a deficient number, since it is larger than the sum of its proper divisors (469841).

4428668191 is an equidigital number, since it uses as much as digits as its factorization.

4428668191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469840.

The product of its digits is 663552, while the sum is 49.

The square root of 4428668191 is about 66548.2395785193. The cubic root of 4428668191 is about 1642.1936971905.

The spelling of 4428668191 in words is "four billion, four hundred twenty-eight million, six hundred sixty-eight thousand, one hundred ninety-one".