72310305 has 32 divisors (see below), whose sum is σ = 120130560. Its totient is φ = 37114560.

The previous prime is 72310267. The next prime is 72310309. The reversal of 72310305 is 50301327.

It is a happy number.

It is not a de Polignac number, because 72310305 - 2⁶ = 72310241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72310309) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 45006 + ... + 46584.

It is an arithmetic number, because the mean of its divisors is an integer number (3754080).

Almost surely, 2^72310305 is an apocalyptic number.

It is an amenable number.

72310305 is a deficient number, since it is larger than the sum of its proper divisors (47820255).

72310305 is a wasteful number, since it uses less digits than its factorization.

72310305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 72310305 is about 8503.5466130315. The cubic root of 72310305 is about 416.6135566084.

The spelling of 72310305 in words is "seventy-two million, three hundred ten thousand, three hundred five".