28728852 has 12 divisors (see below), whose sum is σ = 67034016. Its totient is φ = 9576280.

The previous prime is 28728851. The next prime is 28728857. The reversal of 28728852 is 25882782.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28728851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1197024 + ... + 1197047.

It is an arithmetic number, because the mean of its divisors is an integer number (5586168).

Almost surely, 2^28728852 is an apocalyptic number.

It is an amenable number.

28728852 is an abundant number, since it is smaller than the sum of its proper divisors (38305164).

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

28728852 is a wasteful number, since it uses less digits than its factorization.

28728852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394078 (or 2394076 counting only the distinct ones).

The product of its digits is 143360, while the sum is 42.

The square root of 28728852 is about 5359.9302234264. The cubic root of 28728852 is about 306.2711510034.

The spelling of 28728852 in words is "twenty-eight million, seven hundred twenty-eight thousand, eight hundred fifty-two".