28776073 has 8 divisors (see below), whose sum is σ = 29528928. Its totient is φ = 28027104.

The previous prime is 28776043. The next prime is 28776101. The reversal of 28776073 is 37067782.

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 28776073 - 2²¹ = 26678921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28776023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19365 + ... + 20797.

It is an arithmetic number, because the mean of its divisors is an integer number (3691116).

Almost surely, 2^28776073 is an apocalyptic number.

It is an amenable number.

28776073 is a deficient number, since it is larger than the sum of its proper divisors (752855).

28776073 is a wasteful number, since it uses less digits than its factorization.

28776073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 28776073 is about 5364.3334161851. Note that the first 3 decimals coincide. The cubic root of 28776073 is about 306.4388629304.

The spelling of 28776073 in words is "twenty-eight million, seven hundred seventy-six thousand, seventy-three".