72244620 has 108 divisors (see below), whose sum is σ = 254951424. Its totient is φ = 16511040.

The previous prime is 72244619. The next prime is 72244639. The reversal of 72244620 is 2644227.

It is a happy number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 4725 + ... + 12915.

Almost surely, 2^72244620 is an apocalyptic number.

72244620 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72244620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127475712).

72244620 is an abundant number, since it is smaller than the sum of its proper divisors (182706804).

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

72244620 is a wasteful number, since it uses less digits than its factorization.

72244620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8220 (or 8208 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 72244620 is about 8499.6835235202. The cubic root of 72244620 is about 416.4873710362.

Adding to 72244620 its reverse (2644227), we get a palindrome (74888847).

The spelling of 72244620 in words is "seventy-two million, two hundred forty-four thousand, six hundred twenty".