4228722 has 24 divisors (see below), whose sum is σ = 9479340. Its totient is φ = 1360800.

The previous prime is 4228673. The next prime is 4228723. The reversal of 4228722 is 2278224.

It can be written as a sum of positive squares in 2 ways, for example, as 3606201 + 622521 = 1899^2 + 789^2 .

It is not an unprimeable number, because it can be changed into a prime (4228723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3529 + ... + 4572.

Almost surely, 2^4228722 is an apocalyptic number.

4228722 is an abundant number, since it is smaller than the sum of its proper divisors (5250618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4228722 is a wasteful number, since it uses less digits than its factorization.

4228722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8138 (or 8135 counting only the distinct ones).

The product of its digits is 3584, while the sum is 27.

The square root of 4228722 is about 2056.3856642177. The cubic root of 4228722 is about 161.7098143001.

It can be divided in two parts, 4228 and 722, that added together give a triangular number (4950 = T₉₉).

The spelling of 4228722 in words is "four million, two hundred twenty-eight thousand, seven hundred twenty-two".