72889722028 has 12 divisors (see below), whose sum is σ = 127558977952. Its totient is φ = 36444299760.

The previous prime is 72889722023. The next prime is 72889722047. The reversal of 72889722028 is 82022798827.

It is a self number, because there is not a number n which added to its sum of digits gives 72889722028.

It is not an unprimeable number, because it can be changed into a prime (72889722023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318826 + ... + 497422.

Almost surely, 2^72889722028 is an apocalyptic number.

It is an amenable number.

72889722028 is a deficient number, since it is larger than the sum of its proper divisors (54669255924).

72889722028 is a wasteful number, since it uses less digits than its factorization.

72889722028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280632 (or 280630 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 55.

It can be divided in two parts, 728897 and 22028, that added together give a triangular number (750925 = T₁₂₂₅).

The spelling of 72889722028 in words is "seventy-two billion, eight hundred eighty-nine million, seven hundred twenty-two thousand, twenty-eight".