28838893121 has 4 divisors (see below), whose sum is σ = 28839969792. Its totient is φ = 28837816452.

The previous prime is 28838893067. The next prime is 28838893151. The reversal of 28838893121 is 12139883882.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28838893121 - 2¹⁰ = 28838892097 is a prime.

It is a super-2 number, since 2×28838893121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28838893151) 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 3 ways as a sum of consecutive naturals, for example, 497105 + ... + 552078.

It is an arithmetic number, because the mean of its divisors is an integer number (7209992448).

Almost surely, 2^28838893121 is an apocalyptic number.

It is an amenable number.

28838893121 is a deficient number, since it is larger than the sum of its proper divisors (1076671).

28838893121 is a wasteful number, since it uses less digits than its factorization.

28838893121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076670.

The product of its digits is 1327104, while the sum is 53.

The spelling of 28838893121 in words is "twenty-eight billion, eight hundred thirty-eight million, eight hundred ninety-three thousand, one hundred twenty-one".