28283506 has 4 divisors (see below), whose sum is σ = 42425262. Its totient is φ = 14141752.

The previous prime is 28283483. The next prime is 28283509. The reversal of 28283506 is 60538282.

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., 16443025 + 11840481 = 4055^2 + 3441^2 .

It is not an unprimeable number, because it can be changed into a prime (28283509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7070875 + ... + 7070878.

Almost surely, 2^28283506 is an apocalyptic number.

28283506 is a deficient number, since it is larger than the sum of its proper divisors (14141756).

28283506 is a wasteful number, since it uses less digits than its factorization.

28283506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14141755.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28283506 is about 5318.2239516590. The cubic root of 28283506 is about 304.6803279714.

The spelling of 28283506 in words is "twenty-eight million, two hundred eighty-three thousand, five hundred six".