28780873101 has 24 divisors (see below), whose sum is σ = 43142779680. Its totient is φ = 19173590352.

The previous prime is 28780873087. The next prime is 28780873103. The reversal of 28780873101 is 10137808782.

It is not a de Polignac number, because 28780873101 - 2⁷ = 28780872973 is a prime.

It is a super-3 number, since 3×28780873101³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28780873103) 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 23 ways as a sum of consecutive naturals, for example, 305806 + ... + 388688.

It is an arithmetic number, because the mean of its divisors is an integer number (1797615820).

Almost surely, 2^28780873101 is an apocalyptic number.

It is an amenable number.

28780873101 is a deficient number, since it is larger than the sum of its proper divisors (14361906579).

28780873101 is an equidigital number, since it uses as much as digits as its factorization.

28780873101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84327 (or 84315 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The spelling of 28780873101 in words is "twenty-eight billion, seven hundred eighty million, eight hundred seventy-three thousand, one hundred one".