73128045 has 8 divisors (see below), whose sum is σ = 117004896. Its totient is φ = 39001616.

The previous prime is 73128023. The next prime is 73128047. The reversal of 73128045 is 54082137.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73128045 - 2⁶ = 73127981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73128047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2437587 + ... + 2437616.

It is an arithmetic number, because the mean of its divisors is an integer number (14625612).

Almost surely, 2^73128045 is an apocalyptic number.

It is an amenable number.

73128045 is a deficient number, since it is larger than the sum of its proper divisors (43876851).

73128045 is a wasteful number, since it uses less digits than its factorization.

73128045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4875211.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 73128045 is about 8551.4937291680. The cubic root of 73128045 is about 418.1781346628.

The spelling of 73128045 in words is "seventy-three million, one hundred twenty-eight thousand, forty-five".