28203936 has 24 divisors (see below), whose sum is σ = 74035584. Its totient is φ = 9401280.

The previous prime is 28203919. The next prime is 28203937. The reversal of 28203936 is 63930282.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 28203897 and 28203906.

It is not an unprimeable number, because it can be changed into a prime (28203937) 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, 146800 + ... + 146991.

It is an arithmetic number, because the mean of its divisors is an integer number (3084816).

Almost surely, 2^28203936 is an apocalyptic number.

It is an amenable number.

28203936 is an abundant number, since it is smaller than the sum of its proper divisors (45831648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28203936 is a wasteful number, since it uses less digits than its factorization.

28203936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293804 (or 293796 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 28203936 is about 5310.7378018501. The cubic root of 28203936 is about 304.3943405133.

The spelling of 28203936 in words is "twenty-eight million, two hundred three thousand, nine hundred thirty-six".