72309226 has 16 divisors (see below), whose sum is σ = 118672128. Its totient is φ = 32771200.

The previous prime is 72309203. The next prime is 72309241. The reversal of 72309226 is 62290327.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3111 + ... + 12421.

It is an arithmetic number, because the mean of its divisors is an integer number (7417008).

Almost surely, 2^72309226 is an apocalyptic number.

72309226 is a deficient number, since it is larger than the sum of its proper divisors (46362902).

72309226 is a wasteful number, since it uses less digits than its factorization.

72309226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9677.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 72309226 is about 8503.4831686786. The cubic root of 72309226 is about 416.6114843899.

The spelling of 72309226 in words is "seventy-two million, three hundred nine thousand, two hundred twenty-six".