25878578 has 16 divisors (see below), whose sum is σ = 42448320. Its totient is φ = 11734800.

The previous prime is 25878553. The next prime is 25878581. The reversal of 25878578 is 87587852.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10043 + ... + 12353.

It is an arithmetic number, because the mean of its divisors is an integer number (2653020).

Almost surely, 2^25878578 is an apocalyptic number.

25878578 is a deficient number, since it is larger than the sum of its proper divisors (16569742).

25878578 is a wasteful number, since it uses less digits than its factorization.

25878578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833.

The product of its digits is 1254400, while the sum is 50.

The square root of 25878578 is about 5087.0991733993. The cubic root of 25878578 is about 295.7877175892.

The spelling of 25878578 in words is "twenty-five million, eight hundred seventy-eight thousand, five hundred seventy-eight".