25591696 has 40 divisors (see below), whose sum is σ = 54300344. Its totient is φ = 11612160.

The previous prime is 25591673. The next prime is 25591697. The reversal of 25591696 is 69619552.

It can be written as a sum of positive squares in 4 ways, for example, as 190096 + 25401600 = 436^2 + 5040^2 .

It is not an unprimeable number, because it can be changed into a prime (25591697) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11680 + ... + 13696.

Almost surely, 2^25591696 is an apocalyptic number.

25591696 is a gapful number since it is divisible by the number (26) 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 25591696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27150172).

25591696 is an abundant number, since it is smaller than the sum of its proper divisors (28708648).

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

25591696 is a wasteful number, since it uses less digits than its factorization.

25591696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099 (or 2093 counting only the distinct ones).

The product of its digits is 145800, while the sum is 43.

The square root of 25591696 is about 5058.8235786594. The cubic root of 25591696 is about 294.6906495725.

The spelling of 25591696 in words is "twenty-five million, five hundred ninety-one thousand, six hundred ninety-six".