28258328121 has 8 divisors (see below), whose sum is σ = 37680502944. Its totient is φ = 18837519360.

The previous prime is 28258328099. The next prime is 28258328123. The reversal of 28258328121 is 12182385282.

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

It is not a de Polignac number, because 28258328121 - 2¹⁴ = 28258311737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28258328123) 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 in 7 ways as a sum of consecutive naturals, for example, 292231 + ... + 376716.

It is an arithmetic number, because the mean of its divisors is an integer number (4710062868).

Almost surely, 2^28258328121 is an apocalyptic number.

It is an amenable number.

28258328121 is a deficient number, since it is larger than the sum of its proper divisors (9422174823).

28258328121 is a wasteful number, since it uses less digits than its factorization.

28258328121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683031.

The product of its digits is 122880, while the sum is 42.

The spelling of 28258328121 in words is "twenty-eight billion, two hundred fifty-eight million, three hundred twenty-eight thousand, one hundred twenty-one".