25678578 has 8 divisors (see below), whose sum is σ = 51357168. Its totient is φ = 8559524.

The previous prime is 25678577. The next prime is 25678579. The reversal of 25678578 is 87587652.

It is an interprime number because it is at equal distance from previous prime (25678577) and next prime (25678579).

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

25678578 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25678573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2139876 + ... + 2139887.

It is an arithmetic number, because the mean of its divisors is an integer number (6419646).

Almost surely, 2^25678578 is an apocalyptic number.

25678578 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.

25678578 is a wasteful number, since it uses less digits than its factorization.

25678578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279768.

The product of its digits is 940800, while the sum is 48.

The square root of 25678578 is about 5067.4034771271. The cubic root of 25678578 is about 295.0237575428.

The spelling of 25678578 in words is "twenty-five million, six hundred seventy-eight thousand, five hundred seventy-eight".