25870878 has 48 divisors (see below), whose sum is σ = 61556976. Its totient is φ = 7787520.

The previous prime is 25870861. The next prime is 25870891. The reversal of 25870878 is 87807852.

It is a happy number.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 37876 + ... + 38552.

It is an arithmetic number, because the mean of its divisors is an integer number (1282437).

Almost surely, 2^25870878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25870878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30778488).

25870878 is an abundant number, since it is smaller than the sum of its proper divisors (35686098).

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

25870878 is a wasteful number, since it uses less digits than its factorization.

25870878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889 (or 886 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 25870878 is about 5086.3423007108. The cubic root of 25870878 is about 295.7583781184.

The spelling of 25870878 in words is "twenty-five million, eight hundred seventy thousand, eight hundred seventy-eight".