25686940 has 24 divisors (see below), whose sum is σ = 54442080. Its totient is φ = 10179648.

The previous prime is 25686937. The next prime is 25686967. The reversal of 25686940 is 4968652.

It is a happy number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 25686893 and 25686902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3712 + ... + 8071.

It is an arithmetic number, because the mean of its divisors is an integer number (2268420).

Almost surely, 2^25686940 is an apocalyptic number.

25686940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25686940 is an abundant number, since it is smaller than the sum of its proper divisors (28755140).

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

25686940 is a wasteful number, since it uses less digits than its factorization.

25686940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11901 (or 11899 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 25686940 is about 5068.2284873514. The cubic root of 25686940 is about 295.0557780194.

The spelling of 25686940 in words is "twenty-five million, six hundred eighty-six thousand, nine hundred forty".