25687536 has 80 divisors (see below), whose sum is σ = 76780800. Its totient is φ = 7248384.

The previous prime is 25687531. The next prime is 25687549. The reversal of 25687536 is 63578652.

It is a Harshad number since it is a multiple of its sum of digits (42).

Its product of digits (302400) is a multiple of the sum of its prime divisors (960).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25687531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29475 + ... + 30333.

It is an arithmetic number, because the mean of its divisors is an integer number (959760).

Almost surely, 2^25687536 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 25687536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38390400).

25687536 is an abundant number, since it is smaller than the sum of its proper divisors (51093264).

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

25687536 is a wasteful number, since it uses less digits than its factorization.

25687536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966 (or 960 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 25687536 is about 5068.2872846752. The cubic root of 25687536 is about 295.0580600077.

The spelling of 25687536 in words is "twenty-five million, six hundred eighty-seven thousand, five hundred thirty-six".