28817051 has 4 divisors (see below), whose sum is σ = 29114232. Its totient is φ = 28519872.

The previous prime is 28817003. The next prime is 28817069. The reversal of 28817051 is 15071882.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28817051 - 2¹⁸ = 28554907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28816999 and 28817017.

It is not an unprimeable number, because it can be changed into a prime (28817081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148445 + ... + 148638.

It is an arithmetic number, because the mean of its divisors is an integer number (7278558).

Almost surely, 2^28817051 is an apocalyptic number.

28817051 is a deficient number, since it is larger than the sum of its proper divisors (297181).

28817051 is an equidigital number, since it uses as much as digits as its factorization.

28817051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297180.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 28817051 is about 5368.1515440606. The cubic root of 28817051 is about 306.5842533479.

The spelling of 28817051 in words is "twenty-eight million, eight hundred seventeen thousand, fifty-one".