73323728 has 20 divisors (see below), whose sum is σ = 144187200. Its totient is φ = 36114144.

The previous prime is 73323727. The next prime is 73323749. The reversal of 73323728 is 82732337.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73323721) 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 3 ways as a sum of consecutive naturals, for example, 33128 + ... + 35271.

It is an arithmetic number, because the mean of its divisors is an integer number (7209360).

Almost surely, 2^73323728 is an apocalyptic number.

It is an amenable number.

73323728 is a deficient number, since it is larger than the sum of its proper divisors (70863472).

73323728 is a wasteful number, since it uses less digits than its factorization.

73323728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68474 (or 68468 counting only the distinct ones).

The product of its digits is 42336, while the sum is 35.

The square root of 73323728 is about 8562.9275367715. The cubic root of 73323728 is about 418.5508027704.

The spelling of 73323728 in words is "seventy-three million, three hundred twenty-three thousand, seven hundred twenty-eight".