25442320 has 40 divisors (see below), whose sum is σ = 61067520. Its totient is φ = 9847680.

The previous prime is 25442303. The next prime is 25442323. The reversal of 25442320 is 2324452.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 25442291 and 25442300.

It is not an unprimeable number, because it can be changed into a prime (25442323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2650 + ... + 7609.

It is an arithmetic number, because the mean of its divisors is an integer number (1526688).

Almost surely, 2^25442320 is an apocalyptic number.

25442320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25442320 is an abundant number, since it is smaller than the sum of its proper divisors (35625200).

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

25442320 is a wasteful number, since it uses less digits than its factorization.

25442320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10303 (or 10297 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 25442320 is about 5044.0380648841. The cubic root of 25442320 is about 294.1161710985.

Adding to 25442320 its reverse (2324452), we get a palindrome (27766772).

The spelling of 25442320 in words is "twenty-five million, four hundred forty-two thousand, three hundred twenty".