25622220 has 96 divisors (see below), whose sum is σ = 78236928. Its totient is φ = 6227712.

The previous prime is 25622209. The next prime is 25622227. The reversal of 25622220 is 2222652.

It is not an unprimeable number, because it can be changed into a prime (25622227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83307 + ... + 83613.

It is an arithmetic number, because the mean of its divisors is an integer number (814968).

Almost surely, 2^25622220 is an apocalyptic number.

25622220 is a gapful number since it is divisible by the number (20) 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 25622220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39118464).

25622220 is an abundant number, since it is smaller than the sum of its proper divisors (52614708).

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

25622220 is a wasteful number, since it uses less digits than its factorization.

25622220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 25622220 is about 5061.8395865535. The cubic root of 25622220 is about 294.8077652116.

Adding to 25622220 its reverse (2222652), we get a palindrome (27844872).

The spelling of 25622220 in words is "twenty-five million, six hundred twenty-two thousand, two hundred twenty".