72644232 has 16 divisors (see below), whose sum is σ = 181610640. Its totient is φ = 24214736.

The previous prime is 72644227. The next prime is 72644233. The reversal of 72644232 is 23244627.

It is a self number, because there is not a number n which added to its sum of digits gives 72644232.

It is not an unprimeable number, because it can be changed into a prime (72644233) 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 3 ways as a sum of consecutive naturals, for example, 1513398 + ... + 1513445.

It is an arithmetic number, because the mean of its divisors is an integer number (11350665).

Almost surely, 2^72644232 is an apocalyptic number.

It is an amenable number.

72644232 is an abundant number, since it is smaller than the sum of its proper divisors (108966408).

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

72644232 is a wasteful number, since it uses less digits than its factorization.

72644232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026852 (or 3026848 counting only the distinct ones).

The product of its digits is 16128, while the sum is 30.

The square root of 72644232 is about 8523.1585694506. The cubic root of 72644232 is about 417.2538752755.

Adding to 72644232 its reverse (23244627), we get a palindrome (95888859).

The spelling of 72644232 in words is "seventy-two million, six hundred forty-four thousand, two hundred thirty-two".