28183232 has 168 divisors, whose sum is σ = 76443840. Its totient is φ = 10160640.

The previous prime is 28183193. The next prime is 28183241. The reversal of 28183232 is 23238182.

It is a junction number, because it is equal to n+sod(n) for n = 28183195 and 28183204.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 655403 + ... + 655445.

Almost surely, 2^28183232 is an apocalyptic number.

28183232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28183232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38221920).

28183232 is an abundant number, since it is smaller than the sum of its proper divisors (48260608).

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

28183232 is a wasteful number, since it uses less digits than its factorization.

28183232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 82 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 28183232 is about 5308.7881856409. The cubic root of 28183232 is about 304.3198388177.

The spelling of 28183232 in words is "twenty-eight million, one hundred eighty-three thousand, two hundred thirty-two".