22779538 has 8 divisors (see below), whose sum is σ = 34419132. Its totient is φ = 11306496.

The previous prime is 22779517. The next prime is 22779539. The reversal of 22779538 is 83597722.

It can be written as a sum of positive squares in 2 ways, for example, as 20948929 + 1830609 = 4577^2 + 1353^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 22779494 and 22779503.

It is not an unprimeable number, because it can be changed into a prime (22779539) by changing a digit.

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, 41295 + ... + 41842.

Almost surely, 2^22779538 is an apocalyptic number.

22779538 is a deficient number, since it is larger than the sum of its proper divisors (11639594).

22779538 is a wasteful number, since it uses less digits than its factorization.

22779538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83276.

The product of its digits is 211680, while the sum is 43.

The square root of 22779538 is about 4772.7914264087. The cubic root of 22779538 is about 283.4751348638.

The spelling of 22779538 in words is "twenty-two million, seven hundred seventy-nine thousand, five hundred thirty-eight".