25987500 has 288 divisors, whose sum is σ = 104993280. Its totient is φ = 5400000.

The previous prime is 25987469. The next prime is 25987501. The reversal of 25987500 is 578952.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25987501) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 2362495 + ... + 2362505.

It is an arithmetic number, because the mean of its divisors is an integer number (364560).

Almost surely, 2^25987500 is an apocalyptic number.

25987500 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 25987500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52496640).

25987500 is an abundant number, since it is smaller than the sum of its proper divisors (79005780).

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

25987500 is a wasteful number, since it uses less digits than its factorization.

25987500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 25987500 is about 5097.7936403899. The cubic root of 25987500 is about 296.2021233319.

The spelling of 25987500 in words is "twenty-five million, nine hundred eighty-seven thousand, five hundred".