28337028 has 36 divisors (see below), whose sum is σ = 70246512. Its totient is φ = 8888960.

The previous prime is 28337009. The next prime is 28337041. The reversal of 28337028 is 82073382.

It is a happy number.

It is a super-3 number, since 3×28337028³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28337028.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 618 + ... + 7553.

It is an arithmetic number, because the mean of its divisors is an integer number (1951292).

Almost surely, 2^28337028 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 28337028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35123256).

28337028 is an abundant number, since it is smaller than the sum of its proper divisors (41909484).

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

28337028 is a wasteful number, since it uses less digits than its factorization.

28337028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8212 (or 8193 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28337028 is about 5323.2535164127. The cubic root of 28337028 is about 304.8723930938.

The spelling of 28337028 in words is "twenty-eight million, three hundred thirty-seven thousand, twenty-eight".