22280340 has 24 divisors (see below), whose sum is σ = 62385120. Its totient is φ = 5941408.

The previous prime is 22280339. The next prime is 22280359. The reversal of 22280340 is 4308222.

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 7 ways as a sum of consecutive naturals, for example, 185610 + ... + 185729.

It is an arithmetic number, because the mean of its divisors is an integer number (2599380).

Almost surely, 2^22280340 is an apocalyptic number.

22280340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22280340 is an abundant number, since it is smaller than the sum of its proper divisors (40104780).

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

22280340 is a wasteful number, since it uses less digits than its factorization.

22280340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371351 (or 371349 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 22280340 is about 4720.2055040009. The cubic root of 22280340 is about 281.3891005750.

Adding to 22280340 its reverse (4308222), we get a palindrome (26588562).

The spelling of 22280340 in words is "twenty-two million, two hundred eighty thousand, three hundred forty".