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BaseRepresentation
bin11010001000100010…
…110010000000100001
32200102121000100002221
4122020202302000201
5424432004413011
620520232311041
72012240234104
oct321042620041
980377010087
1028060622881
111099a543325
125531542481
132852655385
141502a5073b
15ae373d971
hex6888b2021

28060622881 has 8 divisors (see below), whose sum is σ = 28874352744. Its totient is φ = 27249805440.

The previous prime is 28060622879. The next prime is 28060622897. The reversal of 28060622881 is 18822606082.

It can be written as a sum of positive squares in 4 ways, for example, as 13991104656 + 14069518225 = 118284^2 + 118615^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28060622881 - 21 = 28060622879 is a prime.

It is a super-2 number, since 2×280606228812 (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28060622801) 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 7 ways as a sum of consecutive naturals, for example, 708550 + ... + 747103.

It is an arithmetic number, because the mean of its divisors is an integer number (3609294093).

Almost surely, 228060622881 is an apocalyptic number.

It is an amenable number.

28060622881 is a deficient number, since it is larger than the sum of its proper divisors (813729863).

28060622881 is a wasteful number, since it uses less digits than its factorization.

28060622881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456211.

The product of its (nonzero) digits is 147456, while the sum is 43.

The spelling of 28060622881 in words is "twenty-eight billion, sixty million, six hundred twenty-two thousand, eight hundred eighty-one".