22780247 has 12 divisors (see below), whose sum is σ = 26767656. Its totient is φ = 19328400.

The previous prime is 22780243. The next prime is 22780249. The reversal of 22780247 is 74208722.

It is a happy number.

It is not a de Polignac number, because 22780247 - 2² = 22780243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22780243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2648 + ... + 7250.

It is an arithmetic number, because the mean of its divisors is an integer number (2230638).

Almost surely, 2^22780247 is an apocalyptic number.

22780247 is a deficient number, since it is larger than the sum of its proper divisors (3987409).

22780247 is a wasteful number, since it uses less digits than its factorization.

22780247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4718 (or 4711 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 22780247 is about 4772.8657010228. The cubic root of 22780247 is about 283.4780758334.

Adding to 22780247 its reverse (74208722), we get a palindrome (96988969).

The spelling of 22780247 in words is "twenty-two million, seven hundred eighty thousand, two hundred forty-seven".