25961798 has 4 divisors (see below), whose sum is σ = 38942700. Its totient is φ = 12980898.

The previous prime is 25961797. The next prime is 25961801. The reversal of 25961798 is 89716952.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25961791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6490448 + ... + 6490451.

It is an arithmetic number, because the mean of its divisors is an integer number (9735675).

Almost surely, 2^25961798 is an apocalyptic number.

25961798 is a deficient number, since it is larger than the sum of its proper divisors (12980902).

25961798 is a wasteful number, since it uses less digits than its factorization.

25961798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12980901.

The product of its digits is 272160, while the sum is 47.

The square root of 25961798 is about 5095.2721222718. The cubic root of 25961798 is about 296.1044417781.

The spelling of 25961798 in words is "twenty-five million, nine hundred sixty-one thousand, seven hundred ninety-eight".