28305064 has 8 divisors (see below), whose sum is σ = 53072010. Its totient is φ = 14152528.

The previous prime is 28305061. The next prime is 28305071. The reversal of 28305064 is 46050382.

It can be written as a sum of positive squares in only one way, i.e., 23716900 + 4588164 = 4870^2 + 2142^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28305061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1769059 + ... + 1769074.

Almost surely, 2^28305064 is an apocalyptic number.

It is an amenable number.

28305064 is a deficient number, since it is larger than the sum of its proper divisors (24766946).

28305064 is a wasteful number, since it uses less digits than its factorization.

28305064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538139 (or 3538135 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 28305064 is about 5320.2503700484. The cubic root of 28305064 is about 304.7577185468.

The spelling of 28305064 in words is "twenty-eight million, three hundred five thousand, sixty-four".