25728286 has 8 divisors (see below), whose sum is σ = 38848464. Its totient is φ = 12778800.

The previous prime is 25728247. The next prime is 25728289. The reversal of 25728286 is 68282752.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25728289) 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 3 ways as a sum of consecutive naturals, for example, 42295 + ... + 42898.

It is an arithmetic number, because the mean of its divisors is an integer number (4856058).

Almost surely, 2^25728286 is an apocalyptic number.

25728286 is a deficient number, since it is larger than the sum of its proper divisors (13120178).

25728286 is a wasteful number, since it uses less digits than its factorization.

25728286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85346.

The product of its digits is 107520, while the sum is 40.

The square root of 25728286 is about 5072.3057873121. The cubic root of 25728286 is about 295.2140015710.

The spelling of 25728286 in words is "twenty-five million, seven hundred twenty-eight thousand, two hundred eighty-six".