25728336 has 120 divisors (see below), whose sum is σ = 76457160. Its totient is φ = 8064000.

The previous prime is 25728331. The next prime is 25728347. The reversal of 25728336 is 63382752.

25728336 is a `hidden beast` number, since 2 + 572 + 83 + 3 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3825936 + 21902400 = 1956^2 + 4680^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 25728336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25728331) 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, 254686 + ... + 254786.

It is an arithmetic number, because the mean of its divisors is an integer number (637143).

Almost surely, 2^25728336 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 25728336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38228580).

25728336 is an abundant number, since it is smaller than the sum of its proper divisors (50728824).

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

25728336 is a wasteful number, since it uses less digits than its factorization.

25728336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 196 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 25728336 is about 5072.3107160347. The cubic root of 25728336 is about 295.2141928091.

The spelling of 25728336 in words is "twenty-five million, seven hundred twenty-eight thousand, three hundred thirty-six".