72279238 has 8 divisors (see below), whose sum is σ = 108831888. Its totient is φ = 36001944.

The previous prime is 72279209. The next prime is 72279283. The reversal of 72279238 is 83297227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 72279238.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 68181 + ... + 69232.

It is an arithmetic number, because the mean of its divisors is an integer number (13603986).

Almost surely, 2^72279238 is an apocalyptic number.

72279238 is a deficient number, since it is larger than the sum of its proper divisors (36552650).

72279238 is a wasteful number, since it uses less digits than its factorization.

72279238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137678.

The product of its digits is 84672, while the sum is 40.

The square root of 72279238 is about 8501.7197083884. The cubic root of 72279238 is about 416.5538842128.

The spelling of 72279238 in words is "seventy-two million, two hundred seventy-nine thousand, two hundred thirty-eight".