28100072769072 has 40 divisors (see below), whose sum is σ = 72625169221440. Its totient is φ = 9362392269120.

The previous prime is 28100072769037. The next prime is 28100072769089. The reversal of 28100072769072 is 27096727000182.

It is a super-2 number, since 2×28100072769072² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134227254 + ... + 134436437.

It is an arithmetic number, because the mean of its divisors is an integer number (1815629230536).

Almost surely, 2^{28100072769072} is an apocalyptic number.

It is an amenable number.

28100072769072 is an abundant number, since it is smaller than the sum of its proper divisors (44525096452368).

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

28100072769072 is a wasteful number, since it uses less digits than its factorization.

28100072769072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268665881 (or 268665875 counting only the distinct ones).

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

The spelling of 28100072769072 in words is "twenty-eight trillion, one hundred billion, seventy-two million, seven hundred sixty-nine thousand, seventy-two".