28796321 has 2 divisors, whose sum is σ = 28796322. Its totient is φ = 28796320.

The previous prime is 28796297. The next prime is 28796347. The reversal of 28796321 is 12369782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27415696 + 1380625 = 5236^2 + 1175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28796321 is a prime.

It is equal to p_1787852 and since 28796321 and 1787852 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28796371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14398160 + 14398161.

It is an arithmetic number, because the mean of its divisors is an integer number (14398161).

Almost surely, 2^28796321 is an apocalyptic number.

It is an amenable number.

28796321 is a deficient number, since it is larger than the sum of its proper divisors (1).

28796321 is an equidigital number, since it uses as much as digits as its factorization.

28796321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 28796321 is about 5366.2203644651. The cubic root of 28796321 is about 306.5107203072.

The spelling of 28796321 in words is "twenty-eight million, seven hundred ninety-six thousand, three hundred twenty-one".