1028909161 has 16 divisors (see below), whose sum is σ = 1185020928. Its totient is φ = 875102400.

The previous prime is 1028909159. The next prime is 1028909213. The reversal of 1028909161 is 1619098201.

It is a cyclic number.

It is not a de Polignac number, because 1028909161 - 2¹ = 1028909159 is a prime.

It is a super-3 number, since 3×1028909161³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1028909161.

It is not an unprimeable number, because it can be changed into a prime (1028909131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1092951 + ... + 1093891.

It is an arithmetic number, because the mean of its divisors is an integer number (74063808).

Almost surely, 2^1028909161 is an apocalyptic number.

It is an amenable number.

1028909161 is a deficient number, since it is larger than the sum of its proper divisors (156111767).

1028909161 is an equidigital number, since it uses as much as digits as its factorization.

1028909161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 1028909161 is about 32076.6139266600. The cubic root of 1028909161 is about 1009.5449902891.

The spelling of 1028909161 in words is "one billion, twenty-eight million, nine hundred nine thousand, one hundred sixty-one".