25769989 has 8 divisors (see below), whose sum is σ = 29712960. Its totient is φ = 21892416.

The previous prime is 25769981. The next prime is 25770007. The reversal of 25769989 is 98996752.

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

It is not a de Polignac number, because 25769989 - 2³ = 25769981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25769981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15499 + ... + 17080.

It is an arithmetic number, because the mean of its divisors is an integer number (3714120).

Almost surely, 2^25769989 is an apocalyptic number.

It is an amenable number.

25769989 is a deficient number, since it is larger than the sum of its proper divisors (3942971).

25769989 is a wasteful number, since it uses less digits than its factorization.

25769989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32699.

The product of its digits is 2449440, while the sum is 55.

The square root of 25769989 is about 5076.4149751572. The cubic root of 25769989 is about 295.3734196746.

The spelling of 25769989 in words is "twenty-five million, seven hundred sixty-nine thousand, nine hundred eighty-nine".