25728634 has 8 divisors (see below), whose sum is σ = 38763648. Its totient is φ = 12807420.

The previous prime is 25728617. The next prime is 25728673. The reversal of 25728634 is 43682752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25728593 and 25728602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27882 + ... + 28789.

It is an arithmetic number, because the mean of its divisors is an integer number (4845456).

Almost surely, 2^25728634 is an apocalyptic number.

25728634 is a deficient number, since it is larger than the sum of its proper divisors (13035014).

25728634 is a wasteful number, since it uses less digits than its factorization.

25728634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56900.

The product of its digits is 80640, while the sum is 37.

The square root of 25728634 is about 5072.3400911217. The cubic root of 25728634 is about 295.2153325835.

It can be divided in two parts, 25728 and 634, that added together give a palindrome (26362).

The spelling of 25728634 in words is "twenty-five million, seven hundred twenty-eight thousand, six hundred thirty-four".