25195998 has 16 divisors (see below), whose sum is σ = 50476176. Its totient is φ = 8384640.

The previous prime is 25195991. The next prime is 25196021. The reversal of 25195998 is 89959152.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25195991) 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 7 ways as a sum of consecutive naturals, for example, 790 + ... + 7142.

It is an arithmetic number, because the mean of its divisors is an integer number (3154761).

Almost surely, 2^25195998 is an apocalyptic number.

25195998 is an abundant number, since it is smaller than the sum of its proper divisors (25280178).

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

25195998 is a wasteful number, since it uses less digits than its factorization.

25195998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7019.

The product of its digits is 291600, while the sum is 48.

The square root of 25195998 is about 5019.5615346363. The cubic root of 25195998 is about 293.1639210582.

The spelling of 25195998 in words is "twenty-five million, one hundred ninety-five thousand, nine hundred ninety-eight".