25728823 has 4 divisors (see below), whose sum is σ = 25754400. Its totient is φ = 25703248.

The previous prime is 25728821. The next prime is 25728827. The reversal of 25728823 is 32882752.

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

It is a cyclic number.

It is not a de Polignac number, because 25728823 - 2¹ = 25728821 is a prime.

It is a super-3 number, since 3×25728823³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25728821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11215 + ... + 13312.

It is an arithmetic number, because the mean of its divisors is an integer number (6438600).

Almost surely, 2^25728823 is an apocalyptic number.

25728823 is a deficient number, since it is larger than the sum of its proper divisors (25577).

25728823 is a wasteful number, since it uses less digits than its factorization.

25728823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25576.

The product of its digits is 53760, while the sum is 37.

The square root of 25728823 is about 5072.3587215417. The cubic root of 25728823 is about 295.2160554559.

The spelling of 25728823 in words is "twenty-five million, seven hundred twenty-eight thousand, eight hundred twenty-three".