25563984 has 40 divisors (see below), whose sum is σ = 67034400. Its totient is φ = 8393088.

The previous prime is 25563961. The next prime is 25563991. The reversal of 25563984 is 48936552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 759 + ... + 7190.

It is an arithmetic number, because the mean of its divisors is an integer number (1675860).

Almost surely, 2^25563984 is an apocalyptic number.

25563984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25563984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33517200).

25563984 is an abundant number, since it is smaller than the sum of its proper divisors (41470416).

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

25563984 is a wasteful number, since it uses less digits than its factorization.

25563984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8027 (or 8021 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 25563984 is about 5056.0838600640. The cubic root of 25563984 is about 294.5842424429.

The spelling of 25563984 in words is "twenty-five million, five hundred sixty-three thousand, nine hundred eighty-four".