25444320 has 192 divisors, whose sum is σ = 89994240. Its totient is φ = 5990400.

The previous prime is 25444303. The next prime is 25444327. The reversal of 25444320 is 2344452.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25444327) 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, 322041 + ... + 322119.

It is an arithmetic number, because the mean of its divisors is an integer number (468720).

Almost surely, 2^25444320 is an apocalyptic number.

25444320 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 25444320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44997120).

25444320 is an abundant number, since it is smaller than the sum of its proper divisors (64549920).

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

25444320 is a wasteful number, since it uses less digits than its factorization.

25444320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 25444320 is about 5044.2363148449. The cubic root of 25444320 is about 294.1238776406.

Adding to 25444320 its reverse (2344452), we get a palindrome (27788772).

The spelling of 25444320 in words is "twenty-five million, four hundred forty-four thousand, three hundred twenty".