25766489 has 16 divisors (see below), whose sum is σ = 31226880. Its totient is φ = 20768400.

The previous prime is 25766483. The next prime is 25766501. The reversal of 25766489 is 98466752.

It is a cyclic number.

It is not a de Polignac number, because 25766489 - 2¹² = 25762393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25766483) 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 15 ways as a sum of consecutive naturals, for example, 19442 + ... + 20724.

It is an arithmetic number, because the mean of its divisors is an integer number (1951680).

Almost surely, 2^25766489 is an apocalyptic number.

It is an amenable number.

25766489 is a deficient number, since it is larger than the sum of its proper divisors (5460391).

25766489 is a wasteful number, since it uses less digits than its factorization.

25766489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460.

The product of its digits is 725760, while the sum is 47.

The square root of 25766489 is about 5076.0702319806. The cubic root of 25766489 is about 295.3600468351.

The spelling of 25766489 in words is "twenty-five million, seven hundred sixty-six thousand, four hundred eighty-nine".