28438837123 has 2 divisors, whose sum is σ = 28438837124. Its totient is φ = 28438837122.

The previous prime is 28438837121. The next prime is 28438837241. The reversal of 28438837123 is 32173883482.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28438837123 - 2¹ = 28438837121 is a prime.

It is a super-3 number, since 3×28438837123³ (a number of 32 digits) contains 333 as substring.

Together with 28438837121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28438837121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14219418561 + 14219418562.

It is an arithmetic number, because the mean of its divisors is an integer number (14219418562).

Almost surely, 2^28438837123 is an apocalyptic number.

28438837123 is a deficient number, since it is larger than the sum of its proper divisors (1).

28438837123 is an equidigital number, since it uses as much as digits as its factorization.

28438837123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 49.

The spelling of 28438837123 in words is "twenty-eight billion, four hundred thirty-eight million, eight hundred thirty-seven thousand, one hundred twenty-three".