25680986 has 4 divisors (see below), whose sum is σ = 38521482. Its totient is φ = 12840492.

The previous prime is 25680973. The next prime is 25681001. The reversal of 25680986 is 68908652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24690961 + 990025 = 4969^2 + 995^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6420245 + ... + 6420248.

Almost surely, 2^25680986 is an apocalyptic number.

25680986 is a deficient number, since it is larger than the sum of its proper divisors (12840496).

25680986 is a wasteful number, since it uses less digits than its factorization.

25680986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12840495.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 25680986 is about 5067.6410685841. The cubic root of 25680986 is about 295.0329791723.

The spelling of 25680986 in words is "twenty-five million, six hundred eighty thousand, nine hundred eighty-six".