72440624 has 20 divisors (see below), whose sum is σ = 140883840. Its totient is φ = 36083520.

The previous prime is 72440617. The next prime is 72440629. The reversal of 72440624 is 42604427.

It is not an unprimeable number, because it can be changed into a prime (72440629) 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, 4112 + ... + 12719.

It is an arithmetic number, because the mean of its divisors is an integer number (7044192).

Almost surely, 2^72440624 is an apocalyptic number.

It is an amenable number.

72440624 is a deficient number, since it is larger than the sum of its proper divisors (68443216).

72440624 is a wasteful number, since it uses less digits than its factorization.

72440624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17108 (or 17102 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 72440624 is about 8511.2057900159. The cubic root of 72440624 is about 416.8636826863.

The spelling of 72440624 in words is "seventy-two million, four hundred forty thousand, six hundred twenty-four".