72203520 has 72 divisors (see below), whose sum is σ = 230612256. Its totient is φ = 19253248.

The previous prime is 72203513. The next prime is 72203531. The reversal of 72203520 is 2530227.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5562 + ... + 13241.

It is an arithmetic number, because the mean of its divisors is an integer number (3202948).

Almost surely, 2^72203520 is an apocalyptic number.

It is an amenable number.

72203520 is an abundant number, since it is smaller than the sum of its proper divisors (158408736).

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

72203520 is a wasteful number, since it uses less digits than its factorization.

72203520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18827 (or 18813 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 72203520 is about 8497.2654424821. The cubic root of 72203520 is about 416.4083760972.

Adding to 72203520 its reverse (2530227), we get a palindrome (74733747).

The spelling of 72203520 in words is "seventy-two million, two hundred three thousand, five hundred twenty".