32728272 has 20 divisors (see below), whose sum is σ = 84548160. Its totient is φ = 10909408.

The previous prime is 32728261. The next prime is 32728273. The reversal of 32728272 is 27282723.

It is a super-2 number, since 2×32728272² = 2142279576211968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32728273) 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 3 ways as a sum of consecutive naturals, for example, 340872 + ... + 340967.

It is an arithmetic number, because the mean of its divisors is an integer number (4227408).

Almost surely, 2^32728272 is an apocalyptic number.

It is an amenable number.

32728272 is an abundant number, since it is smaller than the sum of its proper divisors (51819888).

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

32728272 is a wasteful number, since it uses less digits than its factorization.

32728272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681850 (or 681844 counting only the distinct ones).

The product of its digits is 18816, while the sum is 33.

The square root of 32728272 is about 5720.8628719801. The cubic root of 32728272 is about 319.8706247843.

The spelling of 32728272 in words is "thirty-two million, seven hundred twenty-eight thousand, two hundred seventy-two".