22725306 has 32 divisors (see below), whose sum is σ = 51336000. Its totient is φ = 7449840.

The previous prime is 22725281. The next prime is 22725341. The reversal of 22725306 is 60352722.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 22725306.

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 in 15 ways as a sum of consecutive naturals, for example, 156 + ... + 6743.

It is an arithmetic number, because the mean of its divisors is an integer number (1604250).

Almost surely, 2^22725306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22725306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25668000).

22725306 is an abundant number, since it is smaller than the sum of its proper divisors (28610694).

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

22725306 is a wasteful number, since it uses less digits than its factorization.

22725306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6971 (or 6965 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 22725306 is about 4767.1066696687. The cubic root of 22725306 is about 283.2499965594.

The spelling of 22725306 in words is "twenty-two million, seven hundred twenty-five thousand, three hundred six".