72120226 has 16 divisors (see below), whose sum is σ = 113073408. Its totient is φ = 34434400.

The previous prime is 72120163. The next prime is 72120241. The reversal of 72120226 is 62202127.

It is a junction number, because it is equal to n+sod(n) for n = 72120197 and 72120206.

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 7 ways as a sum of consecutive naturals, for example, 41046 + ... + 42766.

It is an arithmetic number, because the mean of its divisors is an integer number (7067088).

Almost surely, 2^72120226 is an apocalyptic number.

72120226 is a deficient number, since it is larger than the sum of its proper divisors (40953182).

72120226 is a wasteful number, since it uses less digits than its factorization.

72120226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 72120226 is about 8492.3628043084. The cubic root of 72120226 is about 416.2481915471.

The spelling of 72120226 in words is "seventy-two million, one hundred twenty thousand, two hundred twenty-six".