25845040 has 40 divisors (see below), whose sum is σ = 64714608. Its totient is φ = 9542400.

The previous prime is 25845019. The next prime is 25845067. The reversal of 25845040 is 4054852.

It is a tau number, because it is divible by the number of its divisors (40).

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, 11386 + ... + 13465.

Almost surely, 2^25845040 is an apocalyptic number.

25845040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25845040 is an abundant number, since it is smaller than the sum of its proper divisors (38869568).

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

25845040 is a wasteful number, since it uses less digits than its factorization.

25845040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24877 (or 24871 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 25845040 is about 5083.8017270543. The cubic root of 25845040 is about 295.6598844837.

Adding to 25845040 its reverse (4054852), we get a palindrome (29899892).

The spelling of 25845040 in words is "twenty-five million, eight hundred forty-five thousand, forty".