25681448 has 16 divisors (see below), whose sum is σ = 51856980. Its totient is φ = 11852928.

The previous prime is 25681393. The next prime is 25681451. The reversal of 25681448 is 84418652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22448644 + 3232804 = 4738^2 + 1798^2 .

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 3 ways as a sum of consecutive naturals, for example, 123365 + ... + 123572.

Almost surely, 2^25681448 is an apocalyptic number.

It is an amenable number.

25681448 is an abundant number, since it is smaller than the sum of its proper divisors (26175532).

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

25681448 is a wasteful number, since it uses less digits than its factorization.

25681448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246956 (or 246952 counting only the distinct ones).

The product of its digits is 61440, while the sum is 38.

The square root of 25681448 is about 5067.6866517179. The cubic root of 25681448 is about 295.0347483726.

The spelling of 25681448 in words is "twenty-five million, six hundred eighty-one thousand, four hundred forty-eight".