25257798 has 16 divisors (see below), whose sum is σ = 56128560. Its totient is φ = 8419248.

The previous prime is 25257797. The next prime is 25257803. The reversal of 25257798 is 89775252.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25257797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233815 + ... + 233922.

It is an arithmetic number, because the mean of its divisors is an integer number (3508035).

Almost surely, 2^25257798 is an apocalyptic number.

25257798 is an abundant number, since it is smaller than the sum of its proper divisors (30870762).

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

25257798 is a wasteful number, since it uses less digits than its factorization.

25257798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467748 (or 467742 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 25257798 is about 5025.7136806627. The cubic root of 25257798 is about 293.4034132950.

The spelling of 25257798 in words is "twenty-five million, two hundred fifty-seven thousand, seven hundred ninety-eight".