25945280 has 56 divisors (see below), whose sum is σ = 62544960. Its totient is φ = 10250240.

The previous prime is 25945277. The next prime is 25945307. The reversal of 25945280 is 8254952.

It is a happy number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 25945280.

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 7 ways as a sum of consecutive naturals, for example, 28025 + ... + 28935.

Almost surely, 2^25945280 is an apocalyptic number.

25945280 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 25945280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31272480).

25945280 is an abundant number, since it is smaller than the sum of its proper divisors (36599680).

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

25945280 is an equidigital number, since it uses as much as digits as its factorization.

25945280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 25945280 is about 5093.6509499572. The cubic root of 25945280 is about 296.0416303755.

The spelling of 25945280 in words is "twenty-five million, nine hundred forty-five thousand, two hundred eighty".