25705863 has 16 divisors (see below), whose sum is σ = 38287840. Its totient is φ = 17044992.

The previous prime is 25705859. The next prime is 25705871. The reversal of 25705863 is 36850752.

25705863 is a `hidden beast` number, since 2 + 5 + 70 + 586 + 3 = 666.

It is not a de Polignac number, because 25705863 - 2² = 25705859 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 (25705063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2745 + ... + 7677.

It is an arithmetic number, because the mean of its divisors is an integer number (2392990).

Almost surely, 2^25705863 is an apocalyptic number.

25705863 is a deficient number, since it is larger than the sum of its proper divisors (12581977).

25705863 is a wasteful number, since it uses less digits than its factorization.

25705863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135 (or 5129 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 25705863 is about 5070.0949695247. The cubic root of 25705863 is about 295.1282139215.

The spelling of 25705863 in words is "twenty-five million, seven hundred five thousand, eight hundred sixty-three".