28849666 has 4 divisors (see below), whose sum is σ = 43274502. Its totient is φ = 14424832.

The previous prime is 28849591. The next prime is 28849669. The reversal of 28849666 is 66694882.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28847641 + 2025 = 5371^2 + 45^2 .

It is not an unprimeable number, because it can be changed into a prime (28849669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7212415 + ... + 7212418.

Almost surely, 2^28849666 is an apocalyptic number.

28849666 is a deficient number, since it is larger than the sum of its proper divisors (14424836).

28849666 is a wasteful number, since it uses less digits than its factorization.

28849666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14424835.

The product of its digits is 995328, while the sum is 49.

The square root of 28849666 is about 5371.1885090732. The cubic root of 28849666 is about 306.6998732683.

The spelling of 28849666 in words is "twenty-eight million, eight hundred forty-nine thousand, six hundred sixty-six".