72816338 has 32 divisors (see below), whose sum is σ = 133052544. Its totient is φ = 29175552.

The previous prime is 72816319. The next prime is 72816347. The reversal of 72816338 is 83361827.

It is a happy number.

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 in 15 ways as a sum of consecutive naturals, for example, 37856 + ... + 39732.

It is an arithmetic number, because the mean of its divisors is an integer number (4157892).

Almost surely, 2^72816338 is an apocalyptic number.

72816338 is a deficient number, since it is larger than the sum of its proper divisors (60236206).

72816338 is a wasteful number, since it uses less digits than its factorization.

72816338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066.

The product of its digits is 48384, while the sum is 38.

The square root of 72816338 is about 8533.2489709372. The cubic root of 72816338 is about 417.5831294900.

The spelling of 72816338 in words is "seventy-two million, eight hundred sixteen thousand, three hundred thirty-eight".