25776 has 30 divisors (see below), whose sum is σ = 72540. Its totient is φ = 8544.

The previous prime is 25771. The next prime is 25793. The reversal of 25776 is 67752.

Added to its reverse (67752) it gives a triangular number (93528 = T₄₃₂).

It is not an unprimeable number, because it can be changed into a prime (25771) 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, 55 + ... + 233.

It is an arithmetic number, because the mean of its divisors is an integer number (2418).

2²⁵⁷⁷⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36270).

25776 is an abundant number, since it is smaller than the sum of its proper divisors (46764).

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

25776 is a wasteful number, since it uses less digits than its factorization.

25776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 184 counting only the distinct ones).

The product of its digits is 2940, while the sum is 27.

The square root of 25776 is about 160.5490579231. The cubic root of 25776 is about 29.5396383746.

Adding to 25776 its reverse (67752), we get a triangular number (93528 = T₄₃₂).

It can be divided in two parts, 257 and 76, that added together give a palindrome (333).

The spelling of 25776 in words is "twenty-five thousand, seven hundred seventy-six".