25878140 has 24 divisors (see below), whose sum is σ = 54474000. Its totient is φ = 10326528.

The previous prime is 25878107. The next prime is 25878143. The reversal of 25878140 is 4187852.

It is a self number, because there is not a number n which added to its sum of digits gives 25878140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25878143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8684 + ... + 11276.

It is an arithmetic number, because the mean of its divisors is an integer number (2269750).

Almost surely, 2^25878140 is an apocalyptic number.

25878140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25878140 is an abundant number, since it is smaller than the sum of its proper divisors (28595860).

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

25878140 is a wasteful number, since it uses less digits than its factorization.

25878140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101 (or 3099 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 25878140 is about 5087.0561231423. The cubic root of 25878140 is about 295.7860488248.

The spelling of 25878140 in words is "twenty-five million, eight hundred seventy-eight thousand, one hundred forty".