25728789 has 8 divisors (see below), whose sum is σ = 35796672. Its totient is φ = 16406720.

The previous prime is 25728721. The next prime is 25728809. The reversal of 25728789 is 98782752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25728789 - 2⁸ = 25728533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25728709) 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 7 ways as a sum of consecutive naturals, for example, 186372 + ... + 186509.

It is an arithmetic number, because the mean of its divisors is an integer number (4474584).

Almost surely, 2^25728789 is an apocalyptic number.

It is an amenable number.

25728789 is a deficient number, since it is larger than the sum of its proper divisors (10067883).

25728789 is a wasteful number, since it uses less digits than its factorization.

25728789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372907.

The product of its digits is 564480, while the sum is 48.

The square root of 25728789 is about 5072.3553700426. The cubic root of 25728789 is about 295.2159254156.

The spelling of 25728789 in words is "twenty-five million, seven hundred twenty-eight thousand, seven hundred eighty-nine".