25386840 has 96 divisors (see below), whose sum is σ = 83472480. Its totient is φ = 6690816.

The previous prime is 25386833. The next prime is 25386853. The reversal of 25386840 is 4868352.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25386795 and 25386804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34557 + ... + 35283.

It is an arithmetic number, because the mean of its divisors is an integer number (869505).

Almost surely, 2^25386840 is an apocalyptic number.

25386840 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 25386840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41736240).

25386840 is an abundant number, since it is smaller than the sum of its proper divisors (58085640).

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

25386840 is a wasteful number, since it uses less digits than its factorization.

25386840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841 (or 834 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 25386840 is about 5038.5355015123. The cubic root of 25386840 is about 293.9022304364.

The spelling of 25386840 in words is "twenty-five million, three hundred eighty-six thousand, eight hundred forty".