25830656 has 72 divisors (see below), whose sum is σ = 55629504. Its totient is φ = 11939840.

The previous prime is 25830653. The next prime is 25830689. The reversal of 25830656 is 65603852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25830653) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 241355 + ... + 241461.

It is an arithmetic number, because the mean of its divisors is an integer number (772632).

Almost surely, 2^25830656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25830656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27814752).

25830656 is an abundant number, since it is smaller than the sum of its proper divisors (29798848).

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

25830656 is a wasteful number, since it uses less digits than its factorization.

25830656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 25830656 is about 5082.3868408455. The cubic root of 25830656 is about 295.6050246863.

The spelling of 25830656 in words is "twenty-five million, eight hundred thirty thousand, six hundred fifty-six".