25985790 has 24 divisors (see below), whose sum is σ = 67563288. Its totient is φ = 6929520.

The previous prime is 25985761. The next prime is 25985797. The reversal of 25985790 is 9758952.

It is a happy number.

25985790 is a `hidden beast` number, since 2 + 598 + 57 + 9 + 0 = 666.

It is a super-2 number, since 2×25985790² = 1350522563848200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25985797) 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, 144276 + ... + 144455.

It is an arithmetic number, because the mean of its divisors is an integer number (2815137).

Almost surely, 2^25985790 is an apocalyptic number.

25985790 is an abundant number, since it is smaller than the sum of its proper divisors (41577498).

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

25985790 is a wasteful number, since it uses less digits than its factorization.

25985790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288744 (or 288741 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 25985790 is about 5097.6259180132. The cubic root of 25985790 is about 296.1956264040.

The spelling of 25985790 in words is "twenty-five million, nine hundred eighty-five thousand, seven hundred ninety".