25560000 has 210 divisors, whose sum is σ = 92839032. Its totient is φ = 6720000.

The previous prime is 25559983. The next prime is 25560013. The reversal of 25560000 is 6552.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 359965 + ... + 360035.

Almost surely, 2^25560000 is an apocalyptic number.

25560000 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 25560000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46419516).

25560000 is an abundant number, since it is smaller than the sum of its proper divisors (67279032).

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

25560000 is an equidigital number, since it uses as much as digits as its factorization.

25560000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 25560000 is about 5055.6898639058. The cubic root of 25560000 is about 294.5689385607.

Adding to 25560000 its reverse (6552), we get a palindrome (25566552).

The spelling of 25560000 in words is "twenty-five million, five hundred sixty thousand".