72190422 has 48 divisors (see below), whose sum is σ = 167233248. Its totient is φ = 22450560.

The previous prime is 72190411. The next prime is 72190427. The reversal of 72190422 is 22409127.

It is a super-2 number, since 2×72190422² = 10422914057076168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72190427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14848 + ... + 19100.

It is an arithmetic number, because the mean of its divisors is an integer number (3484026).

Almost surely, 2^72190422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72190422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83616624).

72190422 is an abundant number, since it is smaller than the sum of its proper divisors (95042826).

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

72190422 is a wasteful number, since it uses less digits than its factorization.

72190422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4325 (or 4322 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 72190422 is about 8496.4946889879. The cubic root of 72190422 is about 416.3831952069.

Adding to 72190422 its reverse (22409127), we get a palindrome (94599549).

The spelling of 72190422 in words is "seventy-two million, one hundred ninety thousand, four hundred twenty-two".