8820281 has 4 divisors (see below), whose sum is σ = 8865252. Its totient is φ = 8775312.

The previous prime is 8820269. The next prime is 8820283. The reversal of 8820281 is 1820288.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7645225 + 1175056 = 2765^2 + 1084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8820281 is a prime.

It is a super-2 number, since 2×8820281² = 155594713837922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8820283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22190 + ... + 22583.

It is an arithmetic number, because the mean of its divisors is an integer number (2216313).

Almost surely, 2^8820281 is an apocalyptic number.

It is an amenable number.

8820281 is a deficient number, since it is larger than the sum of its proper divisors (44971).

8820281 is a wasteful number, since it uses less digits than its factorization.

8820281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44970.

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 8820281 is about 2969.8957894175. The cubic root of 8820281 is about 206.6145049881.

The spelling of 8820281 in words is "eight million, eight hundred twenty thousand, two hundred eighty-one".