28725536 has 24 divisors (see below), whose sum is σ = 64632960. Its totient is φ = 12310848.

The previous prime is 28725527. The next prime is 28725539. The reversal of 28725536 is 63552782.

It is a self number, because there is not a number n which added to its sum of digits gives 28725536.

It is not an unprimeable number, because it can be changed into a prime (28725539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63896 + ... + 64343.

It is an arithmetic number, because the mean of its divisors is an integer number (2693040).

Almost surely, 2^28725536 is an apocalyptic number.

It is an amenable number.

28725536 is an abundant number, since it is smaller than the sum of its proper divisors (35907424).

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

28725536 is a wasteful number, since it uses less digits than its factorization.

28725536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128256 (or 128248 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 28725536 is about 5359.6208821147. The cubic root of 28725536 is about 306.2593668661.

The spelling of 28725536 in words is "twenty-eight million, seven hundred twenty-five thousand, five hundred thirty-six".