28881203 has 4 divisors (see below), whose sum is σ = 31102848. Its totient is φ = 26659560.

The previous prime is 28881163. The next prime is 28881227. The reversal of 28881203 is 30218882.

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

It is a cyclic number.

It is not a de Polignac number, because 28881203 - 2⁸ = 28880947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28881203.

It is not an unprimeable number, because it can be changed into a prime (28881103) 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 3 ways as a sum of consecutive naturals, for example, 1110803 + ... + 1110828.

It is an arithmetic number, because the mean of its divisors is an integer number (7775712).

Almost surely, 2^28881203 is an apocalyptic number.

28881203 is a deficient number, since it is larger than the sum of its proper divisors (2221645).

28881203 is a wasteful number, since it uses less digits than its factorization.

28881203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221644.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 28881203 is about 5374.1234634124. The cubic root of 28881203 is about 306.8115888491.

The spelling of 28881203 in words is "twenty-eight million, eight hundred eighty-one thousand, two hundred three".