1028662881 has 8 divisors (see below), whose sum is σ = 1385130624. Its totient is φ = 678985200.

The previous prime is 1028662867. The next prime is 1028662889. The reversal of 1028662881 is 1882668201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1028662881 - 2⁷ = 1028662753 is a prime.

It is a super-2 number, since 2×1028662881² = 2116294645494440322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1028662889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1697161 + ... + 1697766.

It is an arithmetic number, because the mean of its divisors is an integer number (173141328).

Almost surely, 2^1028662881 is an apocalyptic number.

It is an amenable number.

1028662881 is a deficient number, since it is larger than the sum of its proper divisors (356467743).

1028662881 is a wasteful number, since it uses less digits than its factorization.

1028662881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395031.

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 1028662881 is about 32072.7747630292. The cubic root of 1028662881 is about 1009.4644355327.

The spelling of 1028662881 in words is "one billion, twenty-eight million, six hundred sixty-two thousand, eight hundred eighty-one".