25730688 has 64 divisors (see below), whose sum is σ = 70233120. Its totient is φ = 8340480.

The previous prime is 25730687. The next prime is 25730699. The reversal of 25730688 is 88603752.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (25730681) 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, 13303 + ... + 15113.

Almost surely, 2^25730688 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 25730688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35116560).

25730688 is an abundant number, since it is smaller than the sum of its proper divisors (44502432).

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

25730688 is a wasteful number, since it uses less digits than its factorization.

25730688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865 (or 1853 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 25730688 is about 5072.5425577318. The cubic root of 25730688 is about 295.2231883724.

The spelling of 25730688 in words is "twenty-five million, seven hundred thirty thousand, six hundred eighty-eight".