72238420 has 48 divisors (see below), whose sum is σ = 159667200. Its totient is φ = 27413120.

The previous prime is 72238381. The next prime is 72238421. The reversal of 72238420 is 2483227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72238421) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 33165 + ... + 35275.

It is an arithmetic number, because the mean of its divisors is an integer number (3326400).

Almost surely, 2^72238420 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 72238420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79833600).

72238420 is an abundant number, since it is smaller than the sum of its proper divisors (87428780).

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

72238420 is a wasteful number, since it uses less digits than its factorization.

72238420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208 (or 2206 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 72238420 is about 8499.3187962330. The cubic root of 72238420 is about 416.4754564440.

The spelling of 72238420 in words is "seventy-two million, two hundred thirty-eight thousand, four hundred twenty".