72220500 has 144 divisors (see below), whose sum is σ = 248713920. Its totient is φ = 17496000.

The previous prime is 72220493. The next prime is 72220513. The reversal of 72220500 is 502227.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48771 + ... + 50229.

It is an arithmetic number, because the mean of its divisors is an integer number (1727180).

Almost surely, 2^72220500 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 72220500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124356960).

72220500 is an abundant number, since it is smaller than the sum of its proper divisors (176493420).

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

72220500 is a wasteful number, since it uses less digits than its factorization.

72220500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495 (or 1480 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 72220500 is about 8498.2645287141. The cubic root of 72220500 is about 416.4410155957.

Adding to 72220500 its reverse (502227), we get a palindrome (72722727).

The spelling of 72220500 in words is "seventy-two million, two hundred twenty thousand, five hundred".