25938409 has 8 divisors (see below), whose sum is σ = 29816640. Its totient is φ = 22103376.

The previous prime is 25938397. The next prime is 25938449. The reversal of 25938409 is 90483952.

It is a happy number.

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 25938409 - 2⁵ = 25938377 is a prime.

It is a super-2 number, since 2×25938409² = 1345602122902562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25938449) 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, 9499 + ... + 11920.

It is an arithmetic number, because the mean of its divisors is an integer number (3727080).

Almost surely, 2^25938409 is an apocalyptic number.

It is an amenable number.

25938409 is a deficient number, since it is larger than the sum of its proper divisors (3878231).

25938409 is a wasteful number, since it uses less digits than its factorization.

25938409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21599.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 25938409 is about 5092.9764381941. The cubic root of 25938409 is about 296.0154948365.

The spelling of 25938409 in words is "twenty-five million, nine hundred thirty-eight thousand, four hundred nine".