25681228 has 6 divisors (see below), whose sum is σ = 44942156. Its totient is φ = 12840612.

The previous prime is 25681199. The next prime is 25681231. The reversal of 25681228 is 82218652.

It is a junction number, because it is equal to n+sod(n) for n = 25681193 and 25681202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210150 + ... + 3210157.

Almost surely, 2^25681228 is an apocalyptic number.

It is an amenable number.

25681228 is a deficient number, since it is larger than the sum of its proper divisors (19260928).

25681228 is a wasteful number, since it uses less digits than its factorization.

25681228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6420311 (or 6420309 counting only the distinct ones).

The product of its digits is 15360, while the sum is 34.

The square root of 25681228 is about 5067.6649455148. The cubic root of 25681228 is about 295.0339058989.

The spelling of 25681228 in words is "twenty-five million, six hundred eighty-one thousand, two hundred twenty-eight".