25859840 has 72 divisors (see below), whose sum is σ = 62914320. Its totient is φ = 10182656.

The previous prime is 25859831. The next prime is 25859849. The reversal of 25859840 is 4895852.

It is an interprime number because it is at equal distance from previous prime (25859831) and next prime (25859849).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25859849) 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, 113807 + ... + 114033.

It is an arithmetic number, because the mean of its divisors is an integer number (873810).

Almost surely, 2^25859840 is an apocalyptic number.

25859840 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 25859840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31457160).

25859840 is an abundant number, since it is smaller than the sum of its proper divisors (37054480).

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

25859840 is an equidigital number, since it uses as much as digits as its factorization.

25859840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 25859840 is about 5085.2571223095. The cubic root of 25859840 is about 295.7163096405.

The spelling of 25859840 in words is "twenty-five million, eight hundred fifty-nine thousand, eight hundred forty".