25840393 has 12 divisors (see below), whose sum is σ = 27228292. Its totient is φ = 24498720.

The previous prime is 25840387. The next prime is 25840417. The reversal of 25840393 is 39304852.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11002489 + 14837904 = 3317^2 + 3852^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25840393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25840313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241446 + ... + 241552.

Almost surely, 2^25840393 is an apocalyptic number.

It is an amenable number.

25840393 is a deficient number, since it is larger than the sum of its proper divisors (1387899).

25840393 is an equidigital number, since it uses as much as digits as its factorization.

25840393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 25840393 is about 5083.3446666540. The cubic root of 25840393 is about 295.6421633035.

The spelling of 25840393 in words is "twenty-five million, eight hundred forty thousand, three hundred ninety-three".