22270420 has 12 divisors (see below), whose sum is σ = 46767924. Its totient is φ = 8908160.

The previous prime is 22270403. The next prime is 22270427. The reversal of 22270420 is 2407222.

It can be written as a sum of positive squares in 2 ways, for example, as 4309776 + 17960644 = 2076^2 + 4238^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22270427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556741 + ... + 556780.

It is an arithmetic number, because the mean of its divisors is an integer number (3897327).

Almost surely, 2^22270420 is an apocalyptic number.

22270420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22270420 is an abundant number, since it is smaller than the sum of its proper divisors (24497504).

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

22270420 is a wasteful number, since it uses less digits than its factorization.

22270420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113530 (or 1113528 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 22270420 is about 4719.1545853044. The cubic root of 22270420 is about 281.3473328962.

Adding to 22270420 its reverse (2407222), we get a palindrome (24677642).

The spelling of 22270420 in words is "twenty-two million, two hundred seventy thousand, four hundred twenty".