32728387 has 8 divisors (see below), whose sum is σ = 33690800. Its totient is φ = 31770144.

The previous prime is 32728369. The next prime is 32728439. The reversal of 32728387 is 78382723.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 32728387 - 2⁷ = 32728259 is a prime.

It is a super-2 number, since 2×32728387² = 2142294631243538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32728307) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22189 + ... + 23617.

It is an arithmetic number, because the mean of its divisors is an integer number (4211350).

Almost surely, 2^32728387 is an apocalyptic number.

32728387 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

32728387 is a deficient number, since it is larger than the sum of its proper divisors (962413).

32728387 is a wasteful number, since it uses less digits than its factorization.

32728387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085.

The product of its digits is 112896, while the sum is 40.

The square root of 32728387 is about 5720.8729229026. The cubic root of 32728387 is about 319.8709994357.

The spelling of 32728387 in words is "thirty-two million, seven hundred twenty-eight thousand, three hundred eighty-seven".