25669984 has 48 divisors (see below), whose sum is σ = 52859520. Its totient is φ = 12257280.

The previous prime is 25669981. The next prime is 25670009. The reversal of 25669984 is 48996652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25669981) 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, 111982 + ... + 112210.

It is an arithmetic number, because the mean of its divisors is an integer number (1101240).

Almost surely, 2^25669984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25669984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26429760).

25669984 is an abundant number, since it is smaller than the sum of its proper divisors (27189536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25669984 is a wasteful number, since it uses less digits than its factorization.

25669984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 375 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The square root of 25669984 is about 5066.5554373756. Note that the first 3 decimals coincide. The cubic root of 25669984 is about 294.9908414278.

The spelling of 25669984 in words is "twenty-five million, six hundred sixty-nine thousand, nine hundred eighty-four".