4222440 has 96 divisors (see below), whose sum is σ = 14138280. Its totient is φ = 1092096.

The previous prime is 4222399. The next prime is 4222483. The reversal of 4222440 is 442224.

4222440 is a `hidden beast` number, since 4 + 222 + 440 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3218436 + 1004004 = 1794^2 + 1002^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13162 + ... + 13478.

Almost surely, 2^4222440 is an apocalyptic number.

4222440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4222440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7069140).

4222440 is an abundant number, since it is smaller than the sum of its proper divisors (9915840).

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

4222440 is a wasteful number, since it uses less digits than its factorization.

4222440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 4222440 is about 2054.8576593039. The cubic root of 4222440 is about 161.6296983290.

Adding to 4222440 its reverse (442224), we get a palindrome (4664664).

The spelling of 4222440 in words is "four million, two hundred twenty-two thousand, four hundred forty".