25338639 has 8 divisors (see below), whose sum is σ = 33828480. Its totient is φ = 16870616.

The previous prime is 25338637. The next prime is 25338661. The reversal of 25338639 is 93683352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25338639 - 2¹ = 25338637 is a prime.

It is a super-3 number, since 3×25338639³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25338597 and 25338606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25338637) 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, 2517 + ... + 7550.

It is an arithmetic number, because the mean of its divisors is an integer number (4228560).

Almost surely, 2^25338639 is an apocalyptic number.

25338639 is a deficient number, since it is larger than the sum of its proper divisors (8489841).

25338639 is a wasteful number, since it uses less digits than its factorization.

25338639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10909.

The product of its digits is 116640, while the sum is 39.

The square root of 25338639 is about 5033.7499937919. The cubic root of 25338639 is about 293.7161057015.

The spelling of 25338639 in words is "twenty-five million, three hundred thirty-eight thousand, six hundred thirty-nine".