28906568 has 8 divisors (see below), whose sum is σ = 54199830. Its totient is φ = 14453280.

The previous prime is 28906567. The next prime is 28906627. The reversal of 28906568 is 86560982.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23251684 + 5654884 = 4822^2 + 2378^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28906567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1806653 + ... + 1806668.

Almost surely, 2^28906568 is an apocalyptic number.

It is an amenable number.

28906568 is a deficient number, since it is larger than the sum of its proper divisors (25293262).

28906568 is a wasteful number, since it uses less digits than its factorization.

28906568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613327 (or 3613323 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 28906568 is about 5376.4828652196. The cubic root of 28906568 is about 306.9013819554.

The spelling of 28906568 in words is "twenty-eight million, nine hundred six thousand, five hundred sixty-eight".