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28814881922 = 229241392
BaseRepresentation
bin11010110101100000…
…000011010010000010
32202101011021122222222
4122311200003102002
5433003102210142
621123134531042
72040026312051
oct326540032202
982334248888
1028814881922
1111247282302
125702066a82
1329429b15b8
141574cb0398
15b39a7cbd2
hex6b5803482

28814881922 has 18 divisors (see below), whose sum is σ = 44774959593. Its totient is φ = 13907271784.

The previous prime is 28814881883. The next prime is 28814881937. The reversal of 28814881922 is 22918841882.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28797750601 + 17131321 = 169699^2 + 4139^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=120031.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 6959729 + ... + 6963867.

Almost surely, 228814881922 is an apocalyptic number.

28814881922 is a deficient number, since it is larger than the sum of its proper divisors (15960077671).

28814881922 is an frugal number, since it uses more digits than its factorization.

28814881922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8338 (or 4170 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 53.

The spelling of 28814881922 in words is "twenty-eight billion, eight hundred fourteen million, eight hundred eighty-one thousand, nine hundred twenty-two".

Divisors: 1 2 29 58 841 1682 4139 8278 120031 240062 3480899 6961798 17131321 34262642 496808309 993616618 14407440961 28814881922