25861320 has 48 divisors (see below), whose sum is σ = 84050460. Its totient is φ = 6896256.

The previous prime is 25861307. The next prime is 25861321. The reversal of 25861320 is 2316852.

25861320 is a `hidden beast` number, since 25 + 8 + 613 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25826724 + 34596 = 5082^2 + 186^2 .

It is not an unprimeable number, because it can be changed into a prime (25861321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35559 + ... + 36278.

Almost surely, 2^25861320 is an apocalyptic number.

25861320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25861320 is an abundant number, since it is smaller than the sum of its proper divisors (58189140).

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

25861320 is a wasteful number, since it uses less digits than its factorization.

25861320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71854 (or 71847 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 25861320 is about 5085.4026389264. The cubic root of 25861320 is about 295.7219509720.

The spelling of 25861320 in words is "twenty-five million, eight hundred sixty-one thousand, three hundred twenty".