25865940 has 24 divisors (see below), whose sum is σ = 72424800. Its totient is φ = 6897568.

The previous prime is 25865929. The next prime is 25865951. The reversal of 25865940 is 4956852.

It is an interprime number because it is at equal distance from previous prime (25865929) and next prime (25865951).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215490 + ... + 215609.

It is an arithmetic number, because the mean of its divisors is an integer number (3017700).

Almost surely, 2^25865940 is an apocalyptic number.

25865940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25865940 is an abundant number, since it is smaller than the sum of its proper divisors (46558860).

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

25865940 is a wasteful number, since it uses less digits than its factorization.

25865940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431111 (or 431109 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 25865940 is about 5085.8568599598. The cubic root of 25865940 is about 295.7395596899.

The spelling of 25865940 in words is "twenty-five million, eight hundred sixty-five thousand, nine hundred forty".