72021576 has 32 divisors (see below), whose sum is σ = 196423200. Its totient is φ = 21824640.

The previous prime is 72021563. The next prime is 72021577. The reversal of 72021576 is 67512027.

It is not an unprimeable number, because it can be changed into a prime (72021577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136141 + ... + 136668.

It is an arithmetic number, because the mean of its divisors is an integer number (6138225).

Almost surely, 2^72021576 is an apocalyptic number.

It is an amenable number.

72021576 is an abundant number, since it is smaller than the sum of its proper divisors (124401624).

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

72021576 is a wasteful number, since it uses less digits than its factorization.

72021576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272829 (or 272825 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 72021576 is about 8486.5526569980. The cubic root of 72021576 is about 416.0583159125.

It can be divided in two parts, 7202 and 1576, that added together give a palindrome (8778).

The spelling of 72021576 in words is "seventy-two million, twenty-one thousand, five hundred seventy-six".