22572072 has 72 divisors (see below), whose sum is σ = 63103950. Its totient is φ = 7288704.

The previous prime is 22572041. The next prime is 22572113. The reversal of 22572072 is 27027522.

It is a happy number.

22572072 is a `hidden beast` number, since 22 + 572 + 0 + 72 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 20304036 + 2268036 = 4506^2 + 1506^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 98454 + ... + 98682.

Almost surely, 2^22572072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22572072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31551975).

22572072 is an abundant number, since it is smaller than the sum of its proper divisors (40531878).

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

22572072 is a wasteful number, since it uses less digits than its factorization.

22572072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 22572072 is about 4751.0074721053. The cubic root of 22572072 is about 282.6119200469.

Adding to 22572072 its reverse (27027522), we get a palindrome (49599594).

The spelling of 22572072 in words is "twenty-two million, five hundred seventy-two thousand, seventy-two".