22772638 has 8 divisors (see below), whose sum is σ = 39038832. Its totient is φ = 9759696.

The previous prime is 22772591. The next prime is 22772641. The reversal of 22772638 is 83627722.

It is a happy number.

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 = 22772597 and 22772606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813295 + ... + 813322.

It is an arithmetic number, because the mean of its divisors is an integer number (4879854).

Almost surely, 2^22772638 is an apocalyptic number.

22772638 is a deficient number, since it is larger than the sum of its proper divisors (16266194).

22772638 is a wasteful number, since it uses less digits than its factorization.

22772638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626626.

The product of its digits is 56448, while the sum is 37.

The square root of 22772638 is about 4772.0685242356. The cubic root of 22772638 is about 283.4465101107.

The spelling of 22772638 in words is "twenty-two million, seven hundred seventy-two thousand, six hundred thirty-eight".