25908987 has 16 divisors (see below), whose sum is σ = 37294880. Its totient is φ = 15904512.

The previous prime is 25908947. The next prime is 25909001. The reversal of 25908987 is 78980952.

It is a happy number.

It is not a de Polignac number, because 25908987 - 2⁷ = 25908859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25908907) 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, 27183 + ... + 28119.

It is an arithmetic number, because the mean of its divisors is an integer number (2330930).

Almost surely, 2^25908987 is an apocalyptic number.

25908987 is a deficient number, since it is larger than the sum of its proper divisors (11385893).

25908987 is a wasteful number, since it uses less digits than its factorization.

25908987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662.

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 25908987 is about 5090.0871308849. The cubic root of 25908987 is about 295.9035287944.

The spelling of 25908987 in words is "twenty-five million, nine hundred eight thousand, nine hundred eighty-seven".