25981870 has 16 divisors (see below), whose sum is σ = 46854288. Its totient is φ = 10373440.

The previous prime is 25981867. The next prime is 25981871. The reversal of 25981870 is 7818952.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25981871) 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, 4065 + ... + 8275.

It is an arithmetic number, because the mean of its divisors is an integer number (2928393).

Almost surely, 2^25981870 is an apocalyptic number.

25981870 is a deficient number, since it is larger than the sum of its proper divisors (20872418).

25981870 is a wasteful number, since it uses less digits than its factorization.

25981870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4835.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 25981870 is about 5097.2414108025. The cubic root of 25981870 is about 296.1807317860.

The spelling of 25981870 in words is "twenty-five million, nine hundred eighty-one thousand, eight hundred seventy".