73136728 has 32 divisors (see below), whose sum is σ = 157116960. Its totient is φ = 31265280.

The previous prime is 73136689. The next prime is 73136741. The reversal of 73136728 is 82763137.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24400 + ... + 27232.

It is an arithmetic number, because the mean of its divisors is an integer number (4909905).

Almost surely, 2^73136728 is an apocalyptic number.

It is an amenable number.

73136728 is an abundant number, since it is smaller than the sum of its proper divisors (83980232).

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

73136728 is a wasteful number, since it uses less digits than its factorization.

73136728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3307 (or 3303 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The square root of 73136728 is about 8552.0014031804. The cubic root of 73136728 is about 418.1946850712.

It can be divided in two parts, 7313 and 6728, that added together give a palindrome (14041).

The spelling of 73136728 in words is "seventy-three million, one hundred thirty-six thousand, seven hundred twenty-eight".