25699968 has 96 divisors (see below), whose sum is σ = 84545760. Its totient is φ = 7340544.

The previous prime is 25699963. The next prime is 25699969. The reversal of 25699968 is 86999652.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25699963) 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 11 ways as a sum of consecutive naturals, for example, 6471 + ... + 9657.

It is an arithmetic number, because the mean of its divisors is an integer number (880685).

Almost surely, 2^25699968 is an apocalyptic number.

25699968 is a gapful number since it is divisible by the number (28) 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 25699968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42272880).

25699968 is an abundant number, since it is smaller than the sum of its proper divisors (58845792).

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

25699968 is a wasteful number, since it uses less digits than its factorization.

25699968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3214 (or 3199 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 25699968 is about 5069.5135861343. The cubic root of 25699968 is about 295.1056520928.

The spelling of 25699968 in words is "twenty-five million, six hundred ninety-nine thousand, nine hundred sixty-eight".