25878558 has 8 divisors (see below), whose sum is σ = 51757128. Its totient is φ = 8626184.

The previous prime is 25878553. The next prime is 25878581. The reversal of 25878558 is 85587852.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

25878558 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25878553) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2156541 + ... + 2156552.

It is an arithmetic number, because the mean of its divisors is an integer number (6469641).

Almost surely, 2^25878558 is an apocalyptic number.

25878558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25878558 is a wasteful number, since it uses less digits than its factorization.

25878558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4313098.

The product of its digits is 896000, while the sum is 48.

The square root of 25878558 is about 5087.0972076421. The cubic root of 25878558 is about 295.7876413903.

The spelling of 25878558 in words is "twenty-five million, eight hundred seventy-eight thousand, five hundred fifty-eight".