25806976 has 48 divisors (see below), whose sum is σ = 55718010. Its totient is φ = 11900928.

The previous prime is 25806971. The next prime is 25806983. The reversal of 25806976 is 67960852.

It can be written as a sum of positive squares in 3 ways, for example, as 13133376 + 12673600 = 3624^2 + 3560^2 .

It is not an unprimeable number, because it can be changed into a prime (25806971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21036 + ... + 22228.

Almost surely, 2^25806976 is an apocalyptic number.

25806976 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25806976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27859005).

25806976 is an abundant number, since it is smaller than the sum of its proper divisors (29911034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25806976 is a wasteful number, since it uses less digits than its factorization.

25806976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233 (or 1208 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 25806976 is about 5080.0566925970. The cubic root of 25806976 is about 295.5146660685.

The spelling of 25806976 in words is "twenty-five million, eight hundred six thousand, nine hundred seventy-six".