28852009 has 16 divisors (see below), whose sum is σ = 31520448. Its totient is φ = 26307072.

The previous prime is 28852007. The next prime is 28852039. The reversal of 28852009 is 90025882.

It is a cyclic number.

It is not a de Polignac number, because 28852009 - 2¹ = 28852007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28852007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82974 + ... + 83320.

It is an arithmetic number, because the mean of its divisors is an integer number (1970028).

Almost surely, 2^28852009 is an apocalyptic number.

It is an amenable number.

28852009 is a deficient number, since it is larger than the sum of its proper divisors (2668439).

28852009 is a wasteful number, since it uses less digits than its factorization.

28852009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 28852009 is about 5371.4066127971. The cubic root of 28852009 is about 306.7081758295.

The spelling of 28852009 in words is "twenty-eight million, eight hundred fifty-two thousand, nine".