25388939 has 12 divisors (see below), whose sum is σ = 27445800. Its totient is φ = 23474688.

The previous prime is 25388929. The next prime is 25388971. The reversal of 25388939 is 93988352.

It is not a de Polignac number, because 25388939 - 2²⁴ = 8611723 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 25388893 and 25388902.

It is not an unprimeable number, because it can be changed into a prime (25388929) 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, 16307 + ... + 17795.

It is an arithmetic number, because the mean of its divisors is an integer number (2287150).

Almost surely, 2^25388939 is an apocalyptic number.

25388939 is a deficient number, since it is larger than the sum of its proper divisors (2056861).

25388939 is a wasteful number, since it uses less digits than its factorization.

25388939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582 (or 1565 counting only the distinct ones).

The product of its digits is 466560, while the sum is 47.

The square root of 25388939 is about 5038.7437918592. The cubic root of 25388939 is about 293.9103302206.

The spelling of 25388939 in words is "twenty-five million, three hundred eighty-eight thousand, nine hundred thirty-nine".