25443849 has 12 divisors (see below), whose sum is σ = 36039344. Its totient is φ = 15964224.

The previous prime is 25443797. The next prime is 25443863. The reversal of 25443849 is 94834452.

It is not a de Polignac number, because 25443849 - 2⁷ = 25443721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25443889) 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, 13807 + ... + 15540.

Almost surely, 2^25443849 is an apocalyptic number.

It is an amenable number.

25443849 is a deficient number, since it is larger than the sum of its proper divisors (10595495).

25443849 is a wasteful number, since it uses less digits than its factorization.

25443849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29384 (or 29367 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 25443849 is about 5044.1896276805. The cubic root of 25443849 is about 294.1220627863.

The spelling of 25443849 in words is "twenty-five million, four hundred forty-three thousand, eight hundred forty-nine".