25681328 has 10 divisors (see below), whose sum is σ = 49757604. Its totient is φ = 12840656.

The previous prime is 25681321. The next prime is 25681333. The reversal of 25681328 is 82318652.

It is not an unprimeable number, because it can be changed into a prime (25681321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802526 + ... + 802557.

Almost surely, 2^25681328 is an apocalyptic number.

It is an amenable number.

25681328 is a deficient number, since it is larger than the sum of its proper divisors (24076276).

25681328 is a wasteful number, since it uses less digits than its factorization.

25681328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605091 (or 1605085 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 25681328 is about 5067.6748119823. The cubic root of 25681328 is about 295.0342888421.

The spelling of 25681328 in words is "twenty-five million, six hundred eighty-one thousand, three hundred twenty-eight".