32728228 has 24 divisors (see below), whose sum is σ = 62431488. Its totient is φ = 14921376.

The previous prime is 32728217. The next prime is 32728229. The reversal of 32728228 is 82282723.

It is a super-2 number, since 2×32728228² = 2142273816039968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 32728193 and 32728202.

It is not an unprimeable number, because it can be changed into a prime (32728229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525 + ... + 8107.

It is an arithmetic number, because the mean of its divisors is an integer number (2601312).

Almost surely, 2^32728228 is an apocalyptic number.

It is an amenable number.

32728228 is a deficient number, since it is larger than the sum of its proper divisors (29703260).

32728228 is a wasteful number, since it uses less digits than its factorization.

32728228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7683 (or 7681 counting only the distinct ones).

The product of its digits is 21504, while the sum is 34.

The square root of 32728228 is about 5720.8590264050. The cubic root of 32728228 is about 319.8704814392.

The spelling of 32728228 in words is "thirty-two million, seven hundred twenty-eight thousand, two hundred twenty-eight".