72344452 has 24 divisors (see below), whose sum is σ = 138378240. Its totient is φ = 32945280.

The previous prime is 72344449. The next prime is 72344477. The reversal of 72344452 is 25444327.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

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 7 ways as a sum of consecutive naturals, for example, 15052 + ... + 19267.

It is an arithmetic number, because the mean of its divisors is an integer number (5765760).

Almost surely, 2^72344452 is an apocalyptic number.

It is an amenable number.

72344452 is a deficient number, since it is larger than the sum of its proper divisors (66033788).

72344452 is a wasteful number, since it uses less digits than its factorization.

72344452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34371 (or 34369 counting only the distinct ones).

The product of its digits is 26880, while the sum is 31.

The square root of 72344452 is about 8505.5541853544. The cubic root of 72344452 is about 416.6791252453.

Adding to 72344452 its reverse (25444327), we get a palindrome (97788779).

The spelling of 72344452 in words is "seventy-two million, three hundred forty-four thousand, four hundred fifty-two".