72344472 has 64 divisors (see below), whose sum is σ = 187060320. Its totient is φ = 23298048.

The previous prime is 72344449. The next prime is 72344477. The reversal of 72344472 is 27444327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72344477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228058 + ... + 228374.

Almost surely, 2^72344472 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 72344472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93530160).

72344472 is an abundant number, since it is smaller than the sum of its proper divisors (114715848).

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

72344472 is a wasteful number, since it uses less digits than its factorization.

72344472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 616 counting only the distinct ones).

The product of its digits is 37632, while the sum is 33.

The square root of 72344472 is about 8505.5553610567. Note that the first 3 decimals coincide. The cubic root of 72344472 is about 416.6791636430.

Adding to 72344472 its reverse (27444327), we get a palindrome (99788799).

The spelling of 72344472 in words is "seventy-two million, three hundred forty-four thousand, four hundred seventy-two".