72445336 has 8 divisors (see below), whose sum is σ = 135835020. Its totient is φ = 36222664.

The previous prime is 72445301. The next prime is 72445337. The reversal of 72445336 is 63354427.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72445337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4527826 + ... + 4527841.

Almost surely, 2^72445336 is an apocalyptic number.

It is an amenable number.

72445336 is a deficient number, since it is larger than the sum of its proper divisors (63389684).

72445336 is a wasteful number, since it uses less digits than its factorization.

72445336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9055673 (or 9055669 counting only the distinct ones).

The product of its digits is 60480, while the sum is 34.

The square root of 72445336 is about 8511.4825970568. The cubic root of 72445336 is about 416.8727209809.

Subtracting from 72445336 its reverse (63354427), we obtain a palindrome (9090909).

The spelling of 72445336 in words is "seventy-two million, four hundred forty-five thousand, three hundred thirty-six".