28791267072 has 72 divisors (see below), whose sum is σ = 76651790544. Its totient is φ = 9593954304.

The previous prime is 28791266989. The next prime is 28791267091. The reversal of 28791267072 is 27076219782.

It is a super-2 number, since 2×28791267072² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 4660978 + ... + 4667150.

It is an arithmetic number, because the mean of its divisors is an integer number (1064608202).

Almost surely, 2^28791267072 is an apocalyptic number.

It is an amenable number.

28791267072 is an abundant number, since it is smaller than the sum of its proper divisors (47860523472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28791267072 is an equidigital number, since it uses as much as digits as its factorization.

28791267072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12265 (or 12251 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 51.

The spelling of 28791267072 in words is "twenty-eight billion, seven hundred ninety-one million, two hundred sixty-seven thousand, seventy-two".