28126644099 has 8 divisors (see below), whose sum is σ = 37503086592. Its totient is φ = 18750648840.

The previous prime is 28126644089. The next prime is 28126644103. The reversal of 28126644099 is 99044662182.

It is a Cunningham number, because it is equal to 167710²-1.

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

It is not a de Polignac number, because 28126644099 - 2⁴ = 28126644083 is a prime.

It is a super-2 number, since 2×28126644099² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28126644059) 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 7 ways as a sum of consecutive naturals, for example, 83854 + ... + 251564.

It is an arithmetic number, because the mean of its divisors is an integer number (4687885824).

Almost surely, 2^28126644099 is an apocalyptic number.

28126644099 is a deficient number, since it is larger than the sum of its proper divisors (9376442493).

28126644099 is a wasteful number, since it uses less digits than its factorization.

28126644099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223617.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The spelling of 28126644099 in words is "twenty-eight billion, one hundred twenty-six million, six hundred forty-four thousand, ninety-nine".