28447936 has 56 divisors (see below), whose sum is σ = 65233296. Its totient is φ = 12165120.

The previous prime is 28447907. The next prime is 28447957. The reversal of 28447936 is 63974482.

It is a junction number, because it is equal to n+sod(n) for n = 28447892 and 28447901.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10780 + ... + 13156.

Almost surely, 2^28447936 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 28447936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32616648).

28447936 is an abundant number, since it is smaller than the sum of its proper divisors (36785360).

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

28447936 is a wasteful number, since it uses less digits than its factorization.

28447936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417 (or 2407 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 28447936 is about 5333.6606566222. The cubic root of 28447936 is about 305.2696209408.

The spelling of 28447936 in words is "twenty-eight million, four hundred forty-seven thousand, nine hundred thirty-six".