32013728 has 12 divisors (see below), whose sum is σ = 63027090. Its totient is φ = 16006848.

The previous prime is 32013697. The next prime is 32013757. The reversal of 32013728 is 82731023.

It can be written as a sum of positive squares in only one way, i.e., 19254544 + 12759184 = 4388^2 + 3572^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

32013728 is a modest number, since divided by 13728 gives 32 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 32013697 and 32013706.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 500183 + ... + 500246.

Almost surely, 2^32013728 is an apocalyptic number.

It is an amenable number.

32013728 is a deficient number, since it is larger than the sum of its proper divisors (31013362).

32013728 is a wasteful number, since it uses less digits than its factorization.

32013728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000439 (or 1000431 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 32013728 is about 5658.0675146202. The cubic root of 32013728 is about 317.5256035731.

The spelling of 32013728 in words is "thirty-two million, thirteen thousand, seven hundred twenty-eight".