25825840 has 40 divisors (see below), whose sum is σ = 61188048. Its totient is φ = 10133760.

The previous prime is 25825829. The next prime is 25825847. The reversal of 25825840 is 4852852.

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 = 25825796 and 25825805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25825847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1195 + ... + 7285.

Almost surely, 2^25825840 is an apocalyptic number.

25825840 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 25825840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30594024).

25825840 is an abundant number, since it is smaller than the sum of its proper divisors (35362208).

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

25825840 is a wasteful number, since it uses less digits than its factorization.

25825840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6157 (or 6151 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 25825840 is about 5081.9130256233. The cubic root of 25825840 is about 295.5866521720.

The spelling of 25825840 in words is "twenty-five million, eight hundred twenty-five thousand, eight hundred forty".