25722228 has 48 divisors (see below), whose sum is σ = 69117440. Its totient is φ = 7293024.

The previous prime is 25722227. The next prime is 25722233. The reversal of 25722228 is 82222752.

It is a junction number, because it is equal to n+sod(n) for n = 25722195 and 25722204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25722223) 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 15 ways as a sum of consecutive naturals, for example, 10575 + ... + 12777.

Almost surely, 2^25722228 is an apocalyptic number.

25722228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25722228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34558720).

25722228 is an abundant number, since it is smaller than the sum of its proper divisors (43395212).

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

25722228 is a wasteful number, since it uses less digits than its factorization.

25722228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356 (or 2354 counting only the distinct ones).

The product of its digits is 8960, while the sum is 30.

The square root of 25722228 is about 5071.7085878430. The cubic root of 25722228 is about 295.1908293212.

The spelling of 25722228 in words is "twenty-five million, seven hundred twenty-two thousand, two hundred twenty-eight".