25807028 has 12 divisors (see below), whose sum is σ = 48636420. Its totient is φ = 11910912.

The previous prime is 25807027. The next prime is 25807031. The reversal of 25807028 is 82070852.

It can be written as a sum of positive squares in 2 ways, for example, as 5484964 + 20322064 = 2342^2 + 4508^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25806985 and 25807003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25807021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248093 + ... + 248196.

It is an arithmetic number, because the mean of its divisors is an integer number (4053035).

Almost surely, 2^25807028 is an apocalyptic number.

It is an amenable number.

25807028 is a deficient number, since it is larger than the sum of its proper divisors (22829392).

25807028 is a wasteful number, since it uses less digits than its factorization.

25807028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496306 (or 496304 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 25807028 is about 5080.0618106476. The cubic root of 25807028 is about 295.5148645517.

The spelling of 25807028 in words is "twenty-five million, eight hundred seven thousand, twenty-eight".