25783857 has 24 divisors (see below), whose sum is σ = 41733120. Its totient is φ = 15202080.

The previous prime is 25783853. The next prime is 25783859. The reversal of 25783857 is 75838752.

It is not a de Polignac number, because 25783857 - 2² = 25783853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25783853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144 + ... + 7182.

It is an arithmetic number, because the mean of its divisors is an integer number (1738880).

Almost surely, 2^25783857 is an apocalyptic number.

It is an amenable number.

25783857 is a deficient number, since it is larger than the sum of its proper divisors (15949263).

25783857 is a wasteful number, since it uses less digits than its factorization.

25783857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7093 (or 7090 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 25783857 is about 5077.7807160215. The cubic root of 25783857 is about 295.4263947847.

The spelling of 25783857 in words is "twenty-five million, seven hundred eighty-three thousand, eight hundred fifty-seven".