73222728 has 16 divisors (see below), whose sum is σ = 183056880. Its totient is φ = 24407568.

The previous prime is 73222693. The next prime is 73222729. The reversal of 73222728 is 82722237.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (73222729) by changing a digit.

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, 1525450 + ... + 1525497.

It is an arithmetic number, because the mean of its divisors is an integer number (11441055).

Almost surely, 2^73222728 is an apocalyptic number.

It is an amenable number.

73222728 is an abundant number, since it is smaller than the sum of its proper divisors (109834152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73222728 is a wasteful number, since it uses less digits than its factorization.

73222728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3050956 (or 3050952 counting only the distinct ones).

The product of its digits is 18816, while the sum is 33.

The square root of 73222728 is about 8557.0279887353. The cubic root of 73222728 is about 418.3585364237.

The spelling of 73222728 in words is "seventy-three million, two hundred twenty-two thousand, seven hundred twenty-eight".