25678239 has 8 divisors (see below), whose sum is σ = 34671360. Its totient is φ = 16901976.

The previous prime is 25678229. The next prime is 25678241. The reversal of 25678239 is 93287652.

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

It is not a de Polignac number, because 25678239 - 2⁴ = 25678223 is a prime.

It is a super-2 number, since 2×25678239² = 1318743916282242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 25678239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25678229) 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, 53937 + ... + 54410.

It is an arithmetic number, because the mean of its divisors is an integer number (4333920).

Almost surely, 2^25678239 is an apocalyptic number.

25678239 is a deficient number, since it is larger than the sum of its proper divisors (8993121).

25678239 is a wasteful number, since it uses less digits than its factorization.

25678239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108429.

The product of its digits is 181440, while the sum is 42.

The square root of 25678239 is about 5067.3700279336. The cubic root of 25678239 is about 295.0224592687.

The spelling of 25678239 in words is "twenty-five million, six hundred seventy-eight thousand, two hundred thirty-nine".