28864011 has 32 divisors (see below), whose sum is σ = 46407168. Its totient is φ = 15741440.

The previous prime is 28864009. The next prime is 28864027. The reversal of 28864011 is 11046882.

It is not a de Polignac number, because 28864011 - 2¹ = 28864009 is a prime.

It is a super-2 number, since 2×28864011² = 1666262262016242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28864011.

It is not an unprimeable number, because it can be changed into a prime (28864001) 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 31 ways as a sum of consecutive naturals, for example, 11785 + ... + 14021.

It is an arithmetic number, because the mean of its divisors is an integer number (1450224).

Almost surely, 2^28864011 is an apocalyptic number.

28864011 is a deficient number, since it is larger than the sum of its proper divisors (17543157).

28864011 is a wasteful number, since it uses less digits than its factorization.

28864011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28864011 is about 5372.5237086494. The cubic root of 28864011 is about 306.7506985901.

The spelling of 28864011 in words is "twenty-eight million, eight hundred sixty-four thousand, eleven".