25806380 has 12 divisors (see below), whose sum is σ = 54193440. Its totient is φ = 10322544.

The previous prime is 25806379. The next prime is 25806397. The reversal of 25806380 is 8360852.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 645140 + ... + 645179.

It is an arithmetic number, because the mean of its divisors is an integer number (4516120).

Almost surely, 2^25806380 is an apocalyptic number.

25806380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25806380 is an abundant number, since it is smaller than the sum of its proper divisors (28387060).

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

25806380 is a wasteful number, since it uses less digits than its factorization.

25806380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290328 (or 1290326 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 25806380 is about 5079.9980314957. The cubic root of 25806380 is about 295.5123911269.

The spelling of 25806380 in words is "twenty-five million, eight hundred six thousand, three hundred eighty".