25778885 has 32 divisors (see below), whose sum is σ = 36288000. Its totient is φ = 17372160.

The previous prime is 25778833. The next prime is 25778897. The reversal of 25778885 is 58887752.

It is not a de Polignac number, because 25778885 - 2¹⁰ = 25777861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73691 + ... + 74039.

It is an arithmetic number, because the mean of its divisors is an integer number (1134000).

Almost surely, 2^25778885 is an apocalyptic number.

It is an amenable number.

25778885 is a deficient number, since it is larger than the sum of its proper divisors (10509115).

25778885 is a wasteful number, since it uses less digits than its factorization.

25778885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461.

The product of its digits is 1254400, while the sum is 50.

The square root of 25778885 is about 5077.2911084554. The cubic root of 25778885 is about 295.4074041625.

The spelling of 25778885 in words is "twenty-five million, seven hundred seventy-eight thousand, eight hundred eighty-five".