22420340 has 12 divisors (see below), whose sum is σ = 47082756. Its totient is φ = 8968128.

The previous prime is 22420339. The next prime is 22420357. The reversal of 22420340 is 4302422.

It can be written as a sum of positive squares in 2 ways, for example, as 6770404 + 15649936 = 2602^2 + 3956^2 .

It is a congruent number.

It is an unprimeable number.

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, 560489 + ... + 560528.

It is an arithmetic number, because the mean of its divisors is an integer number (3923563).

Almost surely, 2^22420340 is an apocalyptic number.

22420340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22420340 is an abundant number, since it is smaller than the sum of its proper divisors (24662416).

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

22420340 is a wasteful number, since it uses less digits than its factorization.

22420340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121026 (or 1121024 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 22420340 is about 4735.0121435958. The cubic root of 22420340 is about 281.9772461228.

Adding to 22420340 its reverse (4302422), we get a palindrome (26722762).

The spelling of 22420340 in words is "twenty-two million, four hundred twenty thousand, three hundred forty".