25856340 has 96 divisors (see below), whose sum is σ = 78395520. Its totient is φ = 6345216.

The previous prime is 25856339. The next prime is 25856353. The reversal of 25856340 is 4365852.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41874 + ... + 42486.

It is an arithmetic number, because the mean of its divisors is an integer number (816620).

Almost surely, 2^25856340 is an apocalyptic number.

25856340 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 25856340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39197760).

25856340 is an abundant number, since it is smaller than the sum of its proper divisors (52539180).

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

25856340 is a wasteful number, since it uses less digits than its factorization.

25856340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 25856340 is about 5084.9129786064. The cubic root of 25856340 is about 295.7029677975.

The spelling of 25856340 in words is "twenty-five million, eight hundred fifty-six thousand, three hundred forty".