22728938 has 4 divisors (see below), whose sum is σ = 34093410. Its totient is φ = 11364468.

The previous prime is 22728929. The next prime is 22728941. The reversal of 22728938 is 83982722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11950849 + 10778089 = 3457^2 + 3283^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22728895 and 22728904.

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 as a sum of consecutive naturals, namely, 5682233 + ... + 5682236.

Almost surely, 2^22728938 is an apocalyptic number.

22728938 is a deficient number, since it is larger than the sum of its proper divisors (11364472).

22728938 is a wasteful number, since it uses less digits than its factorization.

22728938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11364471.

The product of its digits is 96768, while the sum is 41.

The square root of 22728938 is about 4767.4875983058. The cubic root of 22728938 is about 283.2650855999.

The spelling of 22728938 in words is "twenty-two million, seven hundred twenty-eight thousand, nine hundred thirty-eight".