25839040 has 28 divisors (see below), whose sum is σ = 61529976. Its totient is φ = 10335488.

The previous prime is 25839013. The next prime is 25839041. The reversal of 25839040 is 4093852.

It is a junction number, because it is equal to n+sod(n) for n = 25838993 and 25839011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25839041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40054 + ... + 40693.

Almost surely, 2^25839040 is an apocalyptic number.

25839040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25839040 is an abundant number, since it is smaller than the sum of its proper divisors (35690936).

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

25839040 is an equidigital number, since it uses as much as digits as its factorization.

25839040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80764 (or 80754 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 25839040 is about 5083.2115832414. The cubic root of 25839040 is about 295.6370032836.

The spelling of 25839040 in words is "twenty-five million, eight hundred thirty-nine thousand, forty".