25287878 has 32 divisors (see below), whose sum is σ = 48826368. Its totient is φ = 9532800.

The previous prime is 25287869. The next prime is 25287881. The reversal of 25287878 is 87878252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2126 + ... + 7422.

It is an arithmetic number, because the mean of its divisors is an integer number (1525824).

Almost surely, 2^25287878 is an apocalyptic number.

25287878 is a deficient number, since it is larger than the sum of its proper divisors (23538490).

25287878 is a wasteful number, since it uses less digits than its factorization.

25287878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5348.

The product of its digits is 501760, while the sum is 47.

The square root of 25287878 is about 5028.7054000011. The cubic root of 25287878 is about 293.5198403547.

The spelling of 25287878 in words is "twenty-five million, two hundred eighty-seven thousand, eight hundred seventy-eight".