25559996 has 48 divisors (see below), whose sum is σ = 57587712. Its totient is φ = 9633600.

The previous prime is 25559983. The next prime is 25560013. The reversal of 25559996 is 69995552.

It is a congruent number.

It is an unprimeable number.

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, 8210 + ... + 10886.

It is an arithmetic number, because the mean of its divisors is an integer number (1199744).

Almost surely, 2^25559996 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 25559996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28793856).

25559996 is an abundant number, since it is smaller than the sum of its proper divisors (32027716).

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

25559996 is a wasteful number, since it uses less digits than its factorization.

25559996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730 (or 2728 counting only the distinct ones).

The product of its digits is 1093500, while the sum is 50.

The square root of 25559996 is about 5055.6894683119. The cubic root of 25559996 is about 294.5689231946.

Subtracting 25559996 from its reverse (69995552), we obtain a square (44435556 = 6666²).

The spelling of 25559996 in words is "twenty-five million, five hundred fifty-nine thousand, nine hundred ninety-six".