72445424 has 20 divisors (see below), whose sum is σ = 143350944. Its totient is φ = 35451648.

The previous prime is 72445409. The next prime is 72445427. The reversal of 72445424 is 42454427.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72445427) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 47417 + ... + 48920.

Almost surely, 2^72445424 is an apocalyptic number.

It is an amenable number.

72445424 is a deficient number, since it is larger than the sum of its proper divisors (70905520).

72445424 is a wasteful number, since it uses less digits than its factorization.

72445424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96392 (or 96386 counting only the distinct ones).

The product of its digits is 35840, while the sum is 32.

The square root of 72445424 is about 8511.4877665423. The cubic root of 72445424 is about 416.8728897738.

The spelling of 72445424 in words is "seventy-two million, four hundred forty-five thousand, four hundred twenty-four".