22728774 has 16 divisors (see below), whose sum is σ = 46033920. Its totient is φ = 7480200.

The previous prime is 22728773. The next prime is 22728781. The reversal of 22728774 is 47782722.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22728773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23502 + ... + 24449.

It is an arithmetic number, because the mean of its divisors is an integer number (2877120).

Almost surely, 2^22728774 is an apocalyptic number.

22728774 is an abundant number, since it is smaller than the sum of its proper divisors (23305146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22728774 is a wasteful number, since it uses less digits than its factorization.

22728774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48035.

The product of its digits is 87808, while the sum is 39.

The square root of 22728774 is about 4767.4703984398. The cubic root of 22728774 is about 283.2644043012.

The spelling of 22728774 in words is "twenty-two million, seven hundred twenty-eight thousand, seven hundred seventy-four".