25828643 has 4 divisors (see below), whose sum is σ = 25842048. Its totient is φ = 25815240.

The previous prime is 25828631. The next prime is 25828651. The reversal of 25828643 is 34682852.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25828643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25828597 and 25828606.

It is not an unprimeable number, because it can be changed into a prime (25828603) 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, 3203 + ... + 7868.

It is an arithmetic number, because the mean of its divisors is an integer number (6460512).

Almost surely, 2^25828643 is an apocalyptic number.

25828643 is a deficient number, since it is larger than the sum of its proper divisors (13405).

25828643 is a wasteful number, since it uses less digits than its factorization.

25828643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13404.

The product of its digits is 92160, while the sum is 38.

The square root of 25828643 is about 5082.1888001136. The cubic root of 25828643 is about 295.5973455888.

The spelling of 25828643 in words is "twenty-five million, eight hundred twenty-eight thousand, six hundred forty-three".