25781286 has 16 divisors (see below), whose sum is σ = 52660224. Its totient is φ = 8410824.

The previous prime is 25781281. The next prime is 25781297. The reversal of 25781286 is 68218752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25781281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45430 + ... + 45993.

It is an arithmetic number, because the mean of its divisors is an integer number (3291264).

Almost surely, 2^25781286 is an apocalyptic number.

25781286 is an abundant number, since it is smaller than the sum of its proper divisors (26878938).

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

25781286 is a wasteful number, since it uses less digits than its factorization.

25781286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91475.

The product of its digits is 53760, while the sum is 39.

The square root of 25781286 is about 5077.5275479312. The cubic root of 25781286 is about 295.4165751197.

The spelling of 25781286 in words is "twenty-five million, seven hundred eighty-one thousand, two hundred eighty-six".