25823520 has 144 divisors (see below), whose sum is σ = 89631360. Its totient is φ = 6769152.

The previous prime is 25823519. The next prime is 25823569. The reversal of 25823520 is 2532852.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 113647 + ... + 113873.

It is an arithmetic number, because the mean of its divisors is an integer number (622440).

Almost surely, 2^25823520 is an apocalyptic number.

25823520 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 25823520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44815680).

25823520 is an abundant number, since it is smaller than the sum of its proper divisors (63807840).

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

25823520 is a wasteful number, since it uses less digits than its factorization.

25823520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 25823520 is about 5081.6847599984. The cubic root of 25823520 is about 295.5778008101.

The spelling of 25823520 in words is "twenty-five million, eight hundred twenty-three thousand, five hundred twenty".