25435728 has 80 divisors (see below), whose sum is σ = 73884160. Its totient is φ = 8377344.

The previous prime is 25435693. The next prime is 25435733. The reversal of 25435728 is 82753452.

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

It is a junction number, because it is equal to n+sod(n) for n = 25435692 and 25435701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41601 + ... + 42207.

It is an arithmetic number, because the mean of its divisors is an integer number (923552).

Almost surely, 2^25435728 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 25435728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36942080).

25435728 is an abundant number, since it is smaller than the sum of its proper divisors (48448432).

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

25435728 is a wasteful number, since it uses less digits than its factorization.

25435728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721 (or 709 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 25435728 is about 5043.3845778406. The cubic root of 25435728 is about 294.0907674761.

The spelling of 25435728 in words is "twenty-five million, four hundred thirty-five thousand, seven hundred twenty-eight".