28444222 has 8 divisors (see below), whose sum is σ = 43146000. Its totient is φ = 14062224.

The previous prime is 28444219. The next prime is 28444223. The reversal of 28444222 is 22244482.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28444223) 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, 79722 + ... + 80077.

It is an arithmetic number, because the mean of its divisors is an integer number (5393250).

Almost surely, 2^28444222 is an apocalyptic number.

28444222 is a deficient number, since it is larger than the sum of its proper divisors (14701778).

28444222 is a wasteful number, since it uses less digits than its factorization.

28444222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159890.

The product of its digits is 8192, while the sum is 28.

The square root of 28444222 is about 5333.3124791259. The cubic root of 28444222 is about 305.2563356101.

The spelling of 28444222 in words is "twenty-eight million, four hundred forty-four thousand, two hundred twenty-two".