25840940 has 24 divisors (see below), whose sum is σ = 54667872. Its totient is φ = 10259840.

The previous prime is 25840939. The next prime is 25840961. The reversal of 25840940 is 4904852.

It is a junction number, because it is equal to n+sod(n) for n = 25840897 and 25840906.

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 7 ways as a sum of consecutive naturals, for example, 1976 + ... + 7455.

It is an arithmetic number, because the mean of its divisors is an integer number (2277828).

Almost surely, 2^25840940 is an apocalyptic number.

25840940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25840940 is an abundant number, since it is smaller than the sum of its proper divisors (28826932).

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

25840940 is a wasteful number, since it uses less digits than its factorization.

25840940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9577 (or 9575 counting only the distinct ones).

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

The square root of 25840940 is about 5083.3984695280. The cubic root of 25840940 is about 295.6442493801.

The spelling of 25840940 in words is "twenty-five million, eight hundred forty thousand, nine hundred forty".