28801361 has 2 divisors, whose sum is σ = 28801362. Its totient is φ = 28801360.

The previous prime is 28801351. The next prime is 28801439. The reversal of 28801361 is 16310882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14776336 + 14025025 = 3844^2 + 3745^2 .

It is a cyclic number.

It is not a de Polignac number, because 28801361 - 2¹⁰ = 28800337 is a prime.

It is not a weakly prime, because it can be changed into another prime (28801351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14400680 + 14400681.

It is an arithmetic number, because the mean of its divisors is an integer number (14400681).

Almost surely, 2^28801361 is an apocalyptic number.

It is an amenable number.

28801361 is a deficient number, since it is larger than the sum of its proper divisors (1).

28801361 is an equidigital number, since it uses as much as digits as its factorization.

28801361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 28801361 is about 5366.6899481897. The cubic root of 28801361 is about 306.5286013403.

The spelling of 28801361 in words is "twenty-eight million, eight hundred one thousand, three hundred sixty-one".