72021248892 has 36 divisors (see below), whose sum is σ = 182090628720. Its totient is φ = 24002214912.

The previous prime is 72021248851. The next prime is 72021248899. The reversal of 72021248892 is 29884212027.

It is a happy number.

72021248892 is a `hidden beast` number, since 72 + 0 + 2 + 12 + 488 + 92 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×72021248892² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72021248899) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 20592 + ... + 380087.

It is an arithmetic number, because the mean of its divisors is an integer number (5058073020).

Almost surely, 2^72021248892 is an apocalyptic number.

It is an amenable number.

72021248892 is an abundant number, since it is smaller than the sum of its proper divisors (110069379828).

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

72021248892 is a wasteful number, since it uses less digits than its factorization.

72021248892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405682 (or 405677 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 72021248892 in words is "seventy-two billion, twenty-one million, two hundred forty-eight thousand, eight hundred ninety-two".