28203696 has 60 divisors (see below), whose sum is σ = 80042248. Its totient is φ = 9268992.

The previous prime is 28203683. The next prime is 28203701. The reversal of 28203696 is 69630282.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28203696.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 9171 + ... + 11853.

Almost surely, 2^28203696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28203696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40021124).

28203696 is an abundant number, since it is smaller than the sum of its proper divisors (51838552).

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

28203696 is a wasteful number, since it uses less digits than its factorization.

28203696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770 (or 2761 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 28203696 is about 5310.7152060716. The cubic root of 28203696 is about 304.3934771013.

The spelling of 28203696 in words is "twenty-eight million, two hundred three thousand, six hundred ninety-six".