1028881 has 4 divisors (see below), whose sum is σ = 1175872. Its totient is φ = 881892.

The previous prime is 1028873. The next prime is 1028893. The reversal of 1028881 is 1888201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1028881 - 2³ = 1028873 is a prime.

It is a super-2 number, since 2×1028881² = 2117192224322, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1028081) 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, 73485 + ... + 73498.

It is an arithmetic number, because the mean of its divisors is an integer number (293968).

2^1028881 is an apocalyptic number.

It is an amenable number.

1028881 is a deficient number, since it is larger than the sum of its proper divisors (146991).

1028881 is an equidigital number, since it uses as much as digits as its factorization.

1028881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146990.

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 1028881 is about 1014.3377149648. The cubic root of 1028881 is about 100.9535779869.

The spelling of 1028881 in words is "one million, twenty-eight thousand, eight hundred eighty-one".