25087986 has 96 divisors (see below), whose sum is σ = 70806528. Its totient is φ = 6225120.

The previous prime is 25087981. The next prime is 25087991. The reversal of 25087986 is 68978052.

25087986 is a nontrivial binomial coefficient, being equal to C(7084, 2).

It is an interprime number because it is at equal distance from previous prime (25087981) and next prime (25087991).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25087981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31485 + ... + 32271.

It is an arithmetic number, because the mean of its divisors is an integer number (737568).

Almost surely, 2^25087986 is an apocalyptic number.

25087986 is the 7083-rd triangular number and also the 3542-nd hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25087986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35403264).

25087986 is an abundant number, since it is smaller than the sum of its proper divisors (45718542).

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

25087986 is a wasteful number, since it uses less digits than its factorization.

25087986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 25087986 is about 5008.7908720568. The cubic root of 25087986 is about 292.7444023479.

The spelling of 25087986 in words is "twenty-five million, eighty-seven thousand, nine hundred eighty-six".