73028539 has 4 divisors (see below), whose sum is σ = 73076256. Its totient is φ = 72980824.

The previous prime is 73028513. The next prime is 73028561. The reversal of 73028539 is 93582037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93582037 = 859 ⋅108943.

It is a cyclic number.

It is not a de Polignac number, because 73028539 - 2⁵ = 73028507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73028498 and 73028507.

It is not an unprimeable number, because it can be changed into a prime (73028509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21484 + ... + 24649.

It is an arithmetic number, because the mean of its divisors is an integer number (18269064).

Almost surely, 2^73028539 is an apocalyptic number.

73028539 is a deficient number, since it is larger than the sum of its proper divisors (47717).

73028539 is a wasteful number, since it uses less digits than its factorization.

73028539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47716.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 73028539 is about 8545.6737007681. The cubic root of 73028539 is about 417.9883756297.

The spelling of 73028539 in words is "seventy-three million, twenty-eight thousand, five hundred thirty-nine".