25528279 has 8 divisors (see below), whose sum is σ = 29213568. Its totient is φ = 21852600.

The previous prime is 25528259. The next prime is 25528301. The reversal of 25528279 is 97282552.

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

It is not a de Polignac number, because 25528279 - 2⁵ = 25528247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25528249) 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, 4704 + ... + 8554.

It is an arithmetic number, because the mean of its divisors is an integer number (3651696).

Almost surely, 2^25528279 is an apocalyptic number.

25528279 is a deficient number, since it is larger than the sum of its proper divisors (3685289).

25528279 is an equidigital number, since it uses as much as digits as its factorization.

25528279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4805.

The product of its digits is 100800, while the sum is 40.

The square root of 25528279 is about 5052.5517315511. The cubic root of 25528279 is about 294.4470307698.

The spelling of 25528279 in words is "twenty-five million, five hundred twenty-eight thousand, two hundred seventy-nine".