28996073 has 4 divisors (see below), whose sum is σ = 29008980. Its totient is φ = 28983168.

The previous prime is 28996001. The next prime is 28996103. The reversal of 28996073 is 37069982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37069982 = 2 ⋅18534991.

It can be written as a sum of positive squares in 2 ways, for example, as 18550249 + 10445824 = 4307^2 + 3232^2 .

It is a cyclic number.

It is not a de Polignac number, because 28996073 - 2¹⁰ = 28995049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28996573) 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, 2108 + ... + 7901.

It is an arithmetic number, because the mean of its divisors is an integer number (7252245).

Almost surely, 2^28996073 is an apocalyptic number.

It is an amenable number.

28996073 is a deficient number, since it is larger than the sum of its proper divisors (12907).

28996073 is a wasteful number, since it uses less digits than its factorization.

28996073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12906.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 28996073 is about 5384.8001819938. The cubic root of 28996073 is about 307.2178141401.

The spelling of 28996073 in words is "twenty-eight million, nine hundred ninety-six thousand, seventy-three".