28219936 has 24 divisors (see below), whose sum is σ = 56503440. Its totient is φ = 13869888.

The previous prime is 28219907. The next prime is 28219943. The reversal of 28219936 is 63991282.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5586 + ... + 9361.

It is an arithmetic number, because the mean of its divisors is an integer number (2354310).

Almost surely, 2^28219936 is an apocalyptic number.

It is an amenable number.

28219936 is an abundant number, since it is smaller than the sum of its proper divisors (28283504).

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

28219936 is a wasteful number, since it uses less digits than its factorization.

28219936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15016 (or 15008 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 28219936 is about 5312.2439703011. The cubic root of 28219936 is about 304.4518902677.

The spelling of 28219936 in words is "twenty-eight million, two hundred nineteen thousand, nine hundred thirty-six".