32728023 has 8 divisors (see below), whose sum is σ = 48486000. Its totient is φ = 21818664.

The previous prime is 32728021. The next prime is 32728039. The reversal of 32728023 is 32082723.

It is not a de Polignac number, because 32728023 - 2¹ = 32728021 is a prime.

It is a super-2 number, since 2×32728023² = 2142246978977058, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1212149 = 32728023 / (3 + 2 + 7 + 2 + 8 + 0 + 2 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32728021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606048 + ... + 606101.

It is an arithmetic number, because the mean of its divisors is an integer number (6060750).

Almost surely, 2^32728023 is an apocalyptic number.

32728023 is a deficient number, since it is larger than the sum of its proper divisors (15757977).

32728023 is a wasteful number, since it uses less digits than its factorization.

32728023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212158 (or 1212152 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 32728023 is about 5720.8411094873. The cubic root of 32728023 is about 319.8698135796.

The spelling of 32728023 in words is "thirty-two million, seven hundred twenty-eight thousand, twenty-three".