25805828 has 12 divisors (see below), whose sum is σ = 45209052. Its totient is φ = 12888960.

The previous prime is 25805827. The next prime is 25805849. The reversal of 25805828 is 82850852.

It can be written as a sum of positive squares in 2 ways, for example, as 14730244 + 11075584 = 3838^2 + 3328^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25805791 and 25805800.

It is not an unprimeable number, because it can be changed into a prime (25805827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1448 + ... + 7328.

It is an arithmetic number, because the mean of its divisors is an integer number (3767421).

Almost surely, 2^25805828 is an apocalyptic number.

It is an amenable number.

25805828 is a deficient number, since it is larger than the sum of its proper divisors (19403224).

25805828 is a wasteful number, since it uses less digits than its factorization.

25805828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6982 (or 6980 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 38.

The square root of 25805828 is about 5079.9437004754. The cubic root of 25805828 is about 295.5102841026.

The spelling of 25805828 in words is "twenty-five million, eight hundred five thousand, eight hundred twenty-eight".