25287885 has 24 divisors (see below), whose sum is σ = 50094720. Its totient is φ = 11560032.

The previous prime is 25287881. The next prime is 25287887. The reversal of 25287885 is 58878252.

It is not a de Polignac number, because 25287885 - 2² = 25287881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 25287885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25287881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39825 + ... + 40454.

It is an arithmetic number, because the mean of its divisors is an integer number (2087280).

Almost surely, 2^25287885 is an apocalyptic number.

It is an amenable number.

25287885 is a deficient number, since it is larger than the sum of its proper divisors (24806835).

25287885 is a wasteful number, since it uses less digits than its factorization.

25287885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80297 (or 80294 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The square root of 25287885 is about 5028.7060960052. The cubic root of 25287885 is about 293.5198674380.

The spelling of 25287885 in words is "twenty-five million, two hundred eighty-seven thousand, eight hundred eighty-five".