25728757 has 4 divisors (see below), whose sum is σ = 25754560. Its totient is φ = 25702956.

The previous prime is 25728721. The next prime is 25728809. The reversal of 25728757 is 75782752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25728757 - 2¹¹ = 25726709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25728457) 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, 11343 + ... + 13420.

It is an arithmetic number, because the mean of its divisors is an integer number (6438640).

Almost surely, 2^25728757 is an apocalyptic number.

It is an amenable number.

25728757 is a deficient number, since it is larger than the sum of its proper divisors (25803).

25728757 is a wasteful number, since it uses less digits than its factorization.

25728757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25802.

The product of its digits is 274400, while the sum is 43.

The square root of 25728757 is about 5072.3522156885. The cubic root of 25728757 is about 295.2158030247.

The spelling of 25728757 in words is "twenty-five million, seven hundred twenty-eight thousand, seven hundred fifty-seven".