25563340 has 48 divisors (see below), whose sum is σ = 59076864. Its totient is φ = 9214400.

The previous prime is 25563323. The next prime is 25563353. The reversal of 25563340 is 4336552.

It is a junction number, because it is equal to n+sod(n) for n = 25563299 and 25563308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28377 + ... + 29263.

It is an arithmetic number, because the mean of its divisors is an integer number (1230768).

Almost surely, 2^25563340 is an apocalyptic number.

25563340 is a gapful number since it is divisible by the number (20) 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 25563340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29538432).

25563340 is an abundant number, since it is smaller than the sum of its proper divisors (33513524).

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

25563340 is a wasteful number, since it uses less digits than its factorization.

25563340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 25563340 is about 5056.0201740104. The cubic root of 25563340 is about 294.5817687303.

Adding to 25563340 its reverse (4336552), we get a palindrome (29899892).

It can be divided in two parts, 25 and 563340, that added together give a palindrome (563365).

The spelling of 25563340 in words is "twenty-five million, five hundred sixty-three thousand, three hundred forty".