28545712 has 20 divisors (see below), whose sum is σ = 59562160. Its totient is φ = 13174848.

The previous prime is 28545689. The next prime is 28545719. The reversal of 28545712 is 21754582.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28545719) 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, 68412 + ... + 68827.

It is an arithmetic number, because the mean of its divisors is an integer number (2978108).

Almost surely, 2^28545712 is an apocalyptic number.

It is an amenable number.

28545712 is an abundant number, since it is smaller than the sum of its proper divisors (31016448).

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

28545712 is a wasteful number, since it uses less digits than its factorization.

28545712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137260 (or 137254 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 28545712 is about 5342.8187317183. The cubic root of 28545712 is about 305.6189598354.

The spelling of 28545712 in words is "twenty-eight million, five hundred forty-five thousand, seven hundred twelve".