28337856 has 56 divisors (see below), whose sum is σ = 77022960. Its totient is φ = 9188352.

The previous prime is 28337849. The next prime is 28337857. The reversal of 28337856 is 65873382.

It is not an unprimeable number, because it can be changed into a prime (28337857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5110 + ... + 9098.

It is an arithmetic number, because the mean of its divisors is an integer number (1375410).

Almost surely, 2^28337856 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 28337856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38511480).

28337856 is an abundant number, since it is smaller than the sum of its proper divisors (48685104).

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

28337856 is a wasteful number, since it uses less digits than its factorization.

28337856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4041 (or 4031 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 28337856 is about 5323.3312878310. The cubic root of 28337856 is about 304.8753624935.

The spelling of 28337856 in words is "twenty-eight million, three hundred thirty-seven thousand, eight hundred fifty-six".