72279938 has 24 divisors (see below), whose sum is σ = 114996672. Its totient is φ = 34007424.

The previous prime is 72279929. The next prime is 72279959. The reversal of 72279938 is 83997227.

It is a junction number, because it is equal to n+sod(n) for n = 72279892 and 72279901.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 432731 + ... + 432897.

It is an arithmetic number, because the mean of its divisors is an integer number (4791528).

Almost surely, 2^72279938 is an apocalyptic number.

72279938 is a deficient number, since it is larger than the sum of its proper divisors (42716734).

72279938 is a wasteful number, since it uses less digits than its factorization.

72279938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 289 counting only the distinct ones).

The product of its digits is 381024, while the sum is 47.

The square root of 72279938 is about 8501.7608764302. The cubic root of 72279938 is about 416.5552289364. Note that the first 3 decimals are identical.

The spelling of 72279938 in words is "seventy-two million, two hundred seventy-nine thousand, nine hundred thirty-eight".