72081338 has 16 divisors (see below), whose sum is σ = 125134080. Its totient is φ = 30500496.

The previous prime is 72081329. The next prime is 72081349. The reversal of 72081338 is 83318027.

It is an unprimeable number.

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, 31481 + ... + 33692.

It is an arithmetic number, because the mean of its divisors is an integer number (7820880).

Almost surely, 2^72081338 is an apocalyptic number.

72081338 is a deficient number, since it is larger than the sum of its proper divisors (53052742).

72081338 is a wasteful number, since it uses less digits than its factorization.

72081338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65261.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 72081338 is about 8490.0729089920. The cubic root of 72081338 is about 416.1733629317.

The spelling of 72081338 in words is "seventy-two million, eighty-one thousand, three hundred thirty-eight".