72283520 has 64 divisors (see below), whose sum is σ = 176145840. Its totient is φ = 28354560.

The previous prime is 72283517. The next prime is 72283571. The reversal of 72283520 is 2538227.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32855 + ... + 34985.

Almost surely, 2^72283520 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 72283520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88072920).

72283520 is an abundant number, since it is smaller than the sum of its proper divisors (103862320).

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

72283520 is a wasteful number, since it uses less digits than its factorization.

72283520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203 (or 2191 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 72283520 is about 8501.9715360615. The cubic root of 72283520 is about 416.5621099429.

The spelling of 72283520 in words is "seventy-two million, two hundred eighty-three thousand, five hundred twenty".