25878340 has 12 divisors (see below), whose sum is σ = 54344556. Its totient is φ = 10351328.

The previous prime is 25878337. The next prime is 25878379. The reversal of 25878340 is 4387852.

It can be written as a sum of positive squares in 2 ways, for example, as 4032064 + 21846276 = 2008^2 + 4674^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25878340.

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 3 ways as a sum of consecutive naturals, for example, 646939 + ... + 646978.

It is an arithmetic number, because the mean of its divisors is an integer number (4528713).

Almost surely, 2^25878340 is an apocalyptic number.

25878340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25878340 is an abundant number, since it is smaller than the sum of its proper divisors (28466216).

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

25878340 is a wasteful number, since it uses less digits than its factorization.

25878340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293926 (or 1293924 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 25878340 is about 5087.0757808391. The cubic root of 25878340 is about 295.7868108200.

The spelling of 25878340 in words is "twenty-five million, eight hundred seventy-eight thousand, three hundred forty".