28006073 has 4 divisors (see below), whose sum is σ = 28267920. Its totient is φ = 27744228.

The previous prime is 28006039. The next prime is 28006079. The reversal of 28006073 is 37060082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37060082 = 2 ⋅18530041.

It is a cyclic number.

It is not a de Polignac number, because 28006073 - 2¹² = 28001977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28006079) 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, 130763 + ... + 130976.

It is an arithmetic number, because the mean of its divisors is an integer number (7066980).

Almost surely, 2^28006073 is an apocalyptic number.

It is an amenable number.

28006073 is a deficient number, since it is larger than the sum of its proper divisors (261847).

28006073 is a wasteful number, since it uses less digits than its factorization.

28006073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261846.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 28006073 is about 5292.0764355780. The cubic root of 28006073 is about 303.6808494158.

The spelling of 28006073 in words is "twenty-eight million, six thousand, seventy-three".