72230305 has 32 divisors (see below), whose sum is σ = 106536960. Its totient is φ = 45904320.

The previous prime is 72230303. The next prime is 72230309. The reversal of 72230305 is 50303227.

It is a happy number.

It is not a de Polignac number, because 72230305 - 2¹ = 72230303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72230303) 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 31 ways as a sum of consecutive naturals, for example, 30100 + ... + 32410.

It is an arithmetic number, because the mean of its divisors is an integer number (3329280).

Almost surely, 2^72230305 is an apocalyptic number.

It is an amenable number.

72230305 is a deficient number, since it is larger than the sum of its proper divisors (34306655).

72230305 is a wasteful number, since it uses less digits than its factorization.

72230305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389.

The product of its (nonzero) digits is 1260, while the sum is 22.

The square root of 72230305 is about 8498.8413916251. The cubic root of 72230305 is about 416.4598607499.

The spelling of 72230305 in words is "seventy-two million, two hundred thirty thousand, three hundred five".