72244439 has 4 divisors (see below), whose sum is σ = 72370224. Its totient is φ = 72118656.

The previous prime is 72244427. The next prime is 72244457. The reversal of 72244439 is 93444227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93444227 = 2269 ⋅41183.

It is a cyclic number.

It is not a de Polignac number, because 72244439 - 2²⁰ = 71195863 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72244399 and 72244408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72244409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62027 + ... + 63180.

It is an arithmetic number, because the mean of its divisors is an integer number (18092556).

Almost surely, 2^72244439 is an apocalyptic number.

72244439 is a deficient number, since it is larger than the sum of its proper divisors (125785).

72244439 is a wasteful number, since it uses less digits than its factorization.

72244439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125784.

The product of its digits is 48384, while the sum is 35.

The square root of 72244439 is about 8499.6728760582. The cubic root of 72244439 is about 416.4870232167.

The spelling of 72244439 in words is "seventy-two million, two hundred forty-four thousand, four hundred thirty-nine".