72230905 has 8 divisors (see below), whose sum is σ = 86762952. Its totient is φ = 57727488.

The previous prime is 72230903. The next prime is 72230923. The reversal of 72230905 is 50903227.

It can be written as a sum of positive squares in 4 ways, for example, as 23454649 + 48776256 = 4843^2 + 6984^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 72230905 - 2¹ = 72230903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72230903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1144 + ... + 12073.

It is an arithmetic number, because the mean of its divisors is an integer number (10845369).

Almost surely, 2^72230905 is an apocalyptic number.

It is an amenable number.

72230905 is a deficient number, since it is larger than the sum of its proper divisors (14532047).

72230905 is a wasteful number, since it uses less digits than its factorization.

72230905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14315.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 72230905 is about 8498.8766904809. The cubic root of 72230905 is about 416.4610138911.

The spelling of 72230905 in words is "seventy-two million, two hundred thirty thousand, nine hundred five".