25839140 has 12 divisors (see below), whose sum is σ = 54262236. Its totient is φ = 10335648.

The previous prime is 25839139. The next prime is 25839157. The reversal of 25839140 is 4193852.

It can be written as a sum of positive squares in 2 ways, for example, as 7107556 + 18731584 = 2666^2 + 4328^2 .

It is a super-2 number, since 2×25839140² = 1335322311879200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25839097 and 25839106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645959 + ... + 645998.

It is an arithmetic number, because the mean of its divisors is an integer number (4521853).

Almost surely, 2^25839140 is an apocalyptic number.

25839140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25839140 is an abundant number, since it is smaller than the sum of its proper divisors (28423096).

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

25839140 is a wasteful number, since it uses less digits than its factorization.

25839140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291966 (or 1291964 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 25839140 is about 5083.2214195331. The cubic root of 25839140 is about 295.6373846659.

The spelling of 25839140 in words is "twenty-five million, eight hundred thirty-nine thousand, one hundred forty".