25798390 has 16 divisors (see below), whose sum is σ = 48881520. Its totient is φ = 9776160.

The previous prime is 25798379. The next prime is 25798391. The reversal of 25798390 is 9389752.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25798391) 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, 67701 + ... + 68080.

It is an arithmetic number, because the mean of its divisors is an integer number (3055095).

Almost surely, 2^25798390 is an apocalyptic number.

25798390 is a deficient number, since it is larger than the sum of its proper divisors (23083130).

25798390 is a wasteful number, since it uses less digits than its factorization.

25798390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135807.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 25798390 is about 5079.2115529873. The cubic root of 25798390 is about 295.4818897841.

The spelling of 25798390 in words is "twenty-five million, seven hundred ninety-eight thousand, three hundred ninety".