25788279 has 16 divisors (see below), whose sum is σ = 38805120. Its totient is φ = 15089760.

The previous prime is 25788277. The next prime is 25788293. The reversal of 25788279 is 97288752.

25788279 = 110² + 111² + ... + 428².

It is not a de Polignac number, because 25788279 - 2¹ = 25788277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25788271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12517 + ... + 14430.

It is an arithmetic number, because the mean of its divisors is an integer number (2425320).

Almost surely, 2^25788279 is an apocalyptic number.

25788279 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

25788279 is a deficient number, since it is larger than the sum of its proper divisors (13016841).

25788279 is a wasteful number, since it uses less digits than its factorization.

25788279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26990.

The product of its digits is 564480, while the sum is 48.

The square root of 25788279 is about 5078.2161237978. The cubic root of 25788279 is about 295.4432826232.

The spelling of 25788279 in words is "twenty-five million, seven hundred eighty-eight thousand, two hundred seventy-nine".