72023989956 has 24 divisors (see below), whose sum is σ = 168063592704. Its totient is φ = 24006908640.

The previous prime is 72023989867. The next prime is 72023989957. The reversal of 72023989956 is 65998932027.

It is a self number, because there is not a number n which added to its sum of digits gives 72023989956.

It is not an unprimeable number, because it can be changed into a prime (72023989957) 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 7 ways as a sum of consecutive naturals, for example, 166786 + ... + 414566.

It is an arithmetic number, because the mean of its divisors is an integer number (7002649696).

Almost surely, 2^72023989956 is an apocalyptic number.

It is an amenable number.

72023989956 is an abundant number, since it is smaller than the sum of its proper divisors (96039602748).

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

72023989956 is a wasteful number, since it uses less digits than its factorization.

72023989956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272011 (or 272009 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 60.

The spelling of 72023989956 in words is "seventy-two billion, twenty-three million, nine hundred eighty-nine thousand, nine hundred fifty-six".