25195990 has 16 divisors (see below), whose sum is σ = 45410400. Its totient is φ = 10065600.

The previous prime is 25195981. The next prime is 25195991. The reversal of 25195990 is 9959152.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13090 + ... + 14890.

It is an arithmetic number, because the mean of its divisors is an integer number (2838150).

Almost surely, 2^25195990 is an apocalyptic number.

25195990 is a deficient number, since it is larger than the sum of its proper divisors (20214410).

25195990 is a wasteful number, since it uses less digits than its factorization.

25195990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207.

The product of its (nonzero) digits is 36450, while the sum is 40.

The square root of 25195990 is about 5019.5607377539. The cubic root of 25195990 is about 293.1638900306.

The spelling of 25195990 in words is "twenty-five million, one hundred ninety-five thousand, nine hundred ninety".