32720044 has 36 divisors (see below), whose sum is σ = 67143720. Its totient is φ = 13910400.

The previous prime is 32720041. The next prime is 32720063. The reversal of 32720044 is 44002723.

It is a junction number, because it is equal to n+sod(n) for n = 32719997 and 32720024.

It is not an unprimeable number, because it can be changed into a prime (32720041) 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 11 ways as a sum of consecutive naturals, for example, 26644 + ... + 27844.

Almost surely, 2^32720044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32720044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33571860).

32720044 is an abundant number, since it is smaller than the sum of its proper divisors (34423676).

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

32720044 is a wasteful number, since it uses less digits than its factorization.

32720044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358 (or 1349 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 32720044 is about 5720.1437044886. The cubic root of 32720044 is about 319.8438170131.

Adding to 32720044 its reverse (44002723), we get a palindrome (76722767).

The spelling of 32720044 in words is "thirty-two million, seven hundred twenty thousand, forty-four".