22402420 has 12 divisors (see below), whose sum is σ = 47045124. Its totient is φ = 8960960.

The previous prime is 22402399. The next prime is 22402421. The reversal of 22402420 is 2420422.

It can be written as a sum of positive squares in 2 ways, for example, as 3549456 + 18852964 = 1884^2 + 4342^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22402394 and 22402403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22402421) 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, 560041 + ... + 560080.

It is an arithmetic number, because the mean of its divisors is an integer number (3920427).

Almost surely, 2^22402420 is an apocalyptic number.

22402420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22402420 is an abundant number, since it is smaller than the sum of its proper divisors (24642704).

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

22402420 is a wasteful number, since it uses less digits than its factorization.

22402420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120130 (or 1120128 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 22402420 is about 4733.1194787370. The cubic root of 22402420 is about 281.9021003831.

Adding to 22402420 its reverse (2420422), we get a palindrome (24822842).

It can be divided in two parts, 22402 and 420, that added together give a palindrome (22822).

The spelling of 22402420 in words is "twenty-two million, four hundred two thousand, four hundred twenty".