22779956 has 6 divisors (see below), whose sum is σ = 39864930. Its totient is φ = 11389976.

The previous prime is 22779943. The next prime is 22779961. The reversal of 22779956 is 65997722.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16679056 + 6100900 = 4084^2 + 2470^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22779956.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2847491 + ... + 2847498.

It is an arithmetic number, because the mean of its divisors is an integer number (6644155).

Almost surely, 2^22779956 is an apocalyptic number.

It is an amenable number.

22779956 is a deficient number, since it is larger than the sum of its proper divisors (17084974).

22779956 is a wasteful number, since it uses less digits than its factorization.

22779956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5694993 (or 5694991 counting only the distinct ones).

The product of its digits is 476280, while the sum is 47.

The square root of 22779956 is about 4772.8352160954. The cubic root of 22779956 is about 283.4768687573.

The spelling of 22779956 in words is "twenty-two million, seven hundred seventy-nine thousand, nine hundred fifty-six".