32720073 has 8 divisors (see below), whose sum is σ = 43742208. Its totient is φ = 21755664.

The previous prime is 32720063. The next prime is 32720117. The reversal of 32720073 is 37002723.

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

It is not a de Polignac number, because 32720073 - 2⁵ = 32720041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (32720003) 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, 13090 + ... + 15387.

It is an arithmetic number, because the mean of its divisors is an integer number (5467776).

Almost surely, 2^32720073 is an apocalyptic number.

It is an amenable number.

32720073 is a deficient number, since it is larger than the sum of its proper divisors (11022135).

32720073 is a wasteful number, since it uses less digits than its factorization.

32720073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28863.

The product of its (nonzero) digits is 1764, while the sum is 24.

The square root of 32720073 is about 5720.1462393893. The cubic root of 32720073 is about 319.8439115063.

Adding to 32720073 its reverse (37002723), we get a palindrome (69722796).

The spelling of 32720073 in words is "thirty-two million, seven hundred twenty thousand, seventy-three".