28992968421 has 8 divisors (see below), whose sum is σ = 38826101280. Its totient is φ = 19244240592.

The previous prime is 28992968401. The next prime is 28992968447. The reversal of 28992968421 is 12486929982.

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

It is not a de Polignac number, because 28992968421 - 2⁹ = 28992967909 is a prime.

It is a super-2 number, since 2×28992968421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28992968401) 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, 21100455 + ... + 21101828.

It is an arithmetic number, because the mean of its divisors is an integer number (4853262660).

Almost surely, 2^28992968421 is an apocalyptic number.

It is an amenable number.

28992968421 is a deficient number, since it is larger than the sum of its proper divisors (9833132859).

28992968421 is a wasteful number, since it uses less digits than its factorization.

28992968421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42202515.

The product of its digits is 8957952, while the sum is 60.

The spelling of 28992968421 in words is "twenty-eight billion, nine hundred ninety-two million, nine hundred sixty-eight thousand, four hundred twenty-one".