25393839 has 16 divisors (see below), whose sum is σ = 34636800. Its totient is φ = 16544736.

The previous prime is 25393829. The next prime is 25393843. The reversal of 25393839 is 93839352.

It is not a de Polignac number, because 25393839 - 2¹² = 25389743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25393839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25393829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25342 + ... + 26324.

It is an arithmetic number, because the mean of its divisors is an integer number (2164800).

Almost surely, 2^25393839 is an apocalyptic number.

25393839 is a deficient number, since it is larger than the sum of its proper divisors (9242961).

25393839 is a wasteful number, since it uses less digits than its factorization.

25393839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174.

The product of its digits is 174960, while the sum is 42.

The square root of 25393839 is about 5039.2300007045. The cubic root of 25393839 is about 293.9292369839.

The spelling of 25393839 in words is "twenty-five million, three hundred ninety-three thousand, eight hundred thirty-nine".