28707066 has 12 divisors (see below), whose sum is σ = 62198682. Its totient is φ = 9569016.

The previous prime is 28707061. The next prime is 28707073. The reversal of 28707066 is 66070782.

It can be written as a sum of positive squares in only one way, i.e., 19580625 + 9126441 = 4425^2 + 3021^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28707066.

It is not an unprimeable number, because it can be changed into a prime (28707061) 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 5 ways as a sum of consecutive naturals, for example, 797401 + ... + 797436.

Almost surely, 2^28707066 is an apocalyptic number.

28707066 is an abundant number, since it is smaller than the sum of its proper divisors (33491616).

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

28707066 is a wasteful number, since it uses less digits than its factorization.

28707066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594845 (or 1594842 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 28707066 is about 5357.8975354144. The cubic root of 28707066 is about 306.1937130485.

The spelling of 28707066 in words is "twenty-eight million, seven hundred seven thousand, sixty-six".