25728528 has 60 divisors (see below), whose sum is σ = 77323920. Its totient is φ = 7350336.

The previous prime is 25728523. The next prime is 25728529. The reversal of 25728528 is 82582752.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25728523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3118 + ... + 7821.

It is an arithmetic number, because the mean of its divisors is an integer number (1288732).

Almost surely, 2^25728528 is an apocalyptic number.

25728528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25728528 is an abundant number, since it is smaller than the sum of its proper divisors (51595392).

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

25728528 is a wasteful number, since it uses less digits than its factorization.

25728528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10964 (or 10951 counting only the distinct ones).

The product of its digits is 89600, while the sum is 39.

The square root of 25728528 is about 5072.3296422847. The cubic root of 25728528 is about 295.2149271614.

The spelling of 25728528 in words is "twenty-five million, seven hundred twenty-eight thousand, five hundred twenty-eight".