28792880981 has 8 divisors (see below), whose sum is σ = 29015655744. Its totient is φ = 28570528800.

The previous prime is 28792880959. The next prime is 28792881049. The reversal of 28792880981 is 18908829782.

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

It is not a de Polignac number, because 28792880981 - 2³⁰ = 27719139157 is a prime.

It is a super-2 number, since 2×28792880981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28792880911) 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, 31841 + ... + 242073.

It is an arithmetic number, because the mean of its divisors is an integer number (3626956968).

Almost surely, 2^28792880981 is an apocalyptic number.

It is an amenable number.

28792880981 is a deficient number, since it is larger than the sum of its proper divisors (222774763).

28792880981 is a wasteful number, since it uses less digits than its factorization.

28792880981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211291.

The product of its (nonzero) digits is 9289728, while the sum is 62.

The spelling of 28792880981 in words is "twenty-eight billion, seven hundred ninety-two million, eight hundred eighty thousand, nine hundred eighty-one".