25728787 has 8 divisors (see below), whose sum is σ = 30030336. Its totient is φ = 21583752.

The previous prime is 25728721. The next prime is 25728809. The reversal of 25728787 is 78782752.

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 25728787 - 2¹¹ = 25726739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25728487) 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, 38773 + ... + 39430.

It is an arithmetic number, because the mean of its divisors is an integer number (3753792).

Almost surely, 2^25728787 is an apocalyptic number.

25728787 is a deficient number, since it is larger than the sum of its proper divisors (4301549).

25728787 is an equidigital number, since it uses as much as digits as its factorization.

25728787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78257.

The product of its digits is 439040, while the sum is 46.

The square root of 25728787 is about 5072.3551728955. The cubic root of 25728787 is about 295.2159177662.

The spelling of 25728787 in words is "twenty-five million, seven hundred twenty-eight thousand, seven hundred eighty-seven".