72443436 has 24 divisors (see below), whose sum is σ = 182037744. Its totient is φ = 22290240.

The previous prime is 72443429. The next prime is 72443461. The reversal of 72443436 is 63434427.

It is a junction number, because it is equal to n+sod(n) for n = 72443397 and 72443406.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 232035 + ... + 232346.

It is an arithmetic number, because the mean of its divisors is an integer number (7584906).

Almost surely, 2^72443436 is an apocalyptic number.

It is an amenable number.

72443436 is an abundant number, since it is smaller than the sum of its proper divisors (109594308).

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

72443436 is a wasteful number, since it uses less digits than its factorization.

72443436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464401 (or 464399 counting only the distinct ones).

The product of its digits is 48384, while the sum is 33.

The square root of 72443436 is about 8511.3709823976. The cubic root of 72443436 is about 416.8690765544.

Subtracting from 72443436 its reverse (63434427), we obtain a palindrome (9009009).

The spelling of 72443436 in words is "seventy-two million, four hundred forty-three thousand, four hundred thirty-six".