72345385 has 16 divisors (see below), whose sum is σ = 99455616. Its totient is φ = 49488768.

The previous prime is 72345367. The next prime is 72345439. The reversal of 72345385 is 58354327.

It is not a de Polignac number, because 72345385 - 2⁹ = 72344873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13734 + ... + 18256.

It is an arithmetic number, because the mean of its divisors is an integer number (6215976).

Almost surely, 2^72345385 is an apocalyptic number.

It is an amenable number.

72345385 is a deficient number, since it is larger than the sum of its proper divisors (27110231).

72345385 is a wasteful number, since it uses less digits than its factorization.

72345385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4992.

The product of its digits is 100800, while the sum is 37.

The square root of 72345385 is about 8505.6090316920. The cubic root of 72345385 is about 416.6809164904.

The spelling of 72345385 in words is "seventy-two million, three hundred forty-five thousand, three hundred eighty-five".