72388891980 has 144 divisors (see below), whose sum is σ = 226334122560. Its totient is φ = 18713700864.

The previous prime is 72388891979. The next prime is 72388891997. The reversal of 72388891980 is 8919888327.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1825201 + ... + 1864439.

It is an arithmetic number, because the mean of its divisors is an integer number (1571764740).

Almost surely, 2^72388891980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72388891980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113167061280).

72388891980 is an abundant number, since it is smaller than the sum of its proper divisors (153945230580).

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

72388891980 is a wasteful number, since it uses less digits than its factorization.

72388891980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39568 (or 39563 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 63.

The spelling of 72388891980 in words is "seventy-two billion, three hundred eighty-eight million, eight hundred ninety-one thousand, nine hundred eighty".