25704828 has 54 divisors (see below), whose sum is σ = 67230072. Its totient is φ = 8280720.

The previous prime is 25704821. The next prime is 25704871. The reversal of 25704828 is 82840752.

It is a happy number.

25704828 is a `hidden beast` number, since 2 + 570 + 4 + 82 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25704792 and 25704801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25704821) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34225 + ... + 34967.

Almost surely, 2^25704828 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25704828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33615036).

25704828 is an abundant number, since it is smaller than the sum of its proper divisors (41525244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25704828 is a wasteful number, since it uses less digits than its factorization.

25704828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 25704828 is about 5069.9928994033. The cubic root of 25704828 is about 295.1242529340.

The spelling of 25704828 in words is "twenty-five million, seven hundred four thousand, eight hundred twenty-eight".