25679988 has 36 divisors (see below), whose sum is σ = 65126880. Its totient is φ = 8531856.

The previous prime is 25679959. The next prime is 25679989. The reversal of 25679988 is 88997652.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25679989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11931 + ... + 13917.

It is an arithmetic number, because the mean of its divisors is an integer number (1809080).

Almost surely, 2^25679988 is an apocalyptic number.

It is an amenable number.

25679988 is an abundant number, since it is smaller than the sum of its proper divisors (39446892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25679988 is a wasteful number, since it uses less digits than its factorization.

25679988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356 (or 2351 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 25679988 is about 5067.5425997223. The cubic root of 25679988 is about 295.0291573210.

The spelling of 25679988 in words is "twenty-five million, six hundred seventy-nine thousand, nine hundred eighty-eight".