28211692105 has 8 divisors (see below), whose sum is σ = 34769004552. Its totient is φ = 21959371008.

The previous prime is 28211692087. The next prime is 28211692141. The reversal of 28211692105 is 50129611282.

28211692105 is digitally balanced in base 11, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14655281481 + 13556410624 = 121059^2 + 116432^2 .

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 28211692105 - 2¹¹ = 28211690057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

28211692105 is strictly pandigital in base 11.

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 7 ways as a sum of consecutive naturals, for example, 76247632 + ... + 76248001.

It is an arithmetic number, because the mean of its divisors is an integer number (4346125569).

Almost surely, 2^28211692105 is an apocalyptic number.

It is an amenable number.

28211692105 is a deficient number, since it is larger than the sum of its proper divisors (6557312447).

28211692105 is a wasteful number, since it uses less digits than its factorization.

28211692105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152495675.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 28211692105 in words is "twenty-eight billion, two hundred eleven million, six hundred ninety-two thousand, one hundred five".