72333328 has 20 divisors (see below), whose sum is σ = 140308480. Its totient is φ = 36124704.

The previous prime is 72333319. The next prime is 72333341. The reversal of 72333328 is 82333327.

It is a super-2 number, since 2×72333328² = 10464220679111168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72333328.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15313 + ... + 19471.

It is an arithmetic number, because the mean of its divisors is an integer number (7015424).

Almost surely, 2^72333328 is an apocalyptic number.

It is an amenable number.

72333328 is a deficient number, since it is larger than the sum of its proper divisors (67975152).

72333328 is a wasteful number, since it uses less digits than its factorization.

72333328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5254 (or 5248 counting only the distinct ones).

The product of its digits is 18144, while the sum is 31.

The square root of 72333328 is about 8504.9002345707. The cubic root of 72333328 is about 416.6577673477.

Subtracting 72333328 from its reverse (82333327), we obtain a palindrome (9999999).

The spelling of 72333328 in words is "seventy-two million, three hundred thirty-three thousand, three hundred twenty-eight".