28300032 has 108 divisors (see below), whose sum is σ = 83223504. Its totient is φ = 9246720.

The previous prime is 28300031. The next prime is 28300033. The reversal of 28300032 is 23000382.

It is an interprime number because it is at equal distance from previous prime (28300031) and next prime (28300033).

It is a super-2 number, since 2×28300032² = 1601783622402048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 28299978 and 28300014.

It is not an unprimeable number, because it can be changed into a prime (28300031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163498 + ... + 163670.

It is an arithmetic number, because the mean of its divisors is an integer number (770588).

Almost surely, 2^28300032 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 28300032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41611752).

28300032 is an abundant number, since it is smaller than the sum of its proper divisors (54923472).

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

28300032 is a wasteful number, since it uses less digits than its factorization.

28300032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 28300032 is about 5319.7774389536. Note that the first 3 decimals coincide. The cubic root of 28300032 is about 304.7396578007.

The spelling of 28300032 in words is "twenty-eight million, three hundred thousand, thirty-two".