72508345 has 64 divisors (see below), whose sum is σ = 113379840. Its totient is φ = 43296768.

The previous prime is 72508343. The next prime is 72508379. The reversal of 72508345 is 54380527.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72508345 - 2¹ = 72508343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72508345.

It is not an unprimeable number, because it can be changed into a prime (72508343) 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 63 ways as a sum of consecutive naturals, for example, 993229 + ... + 993301.

It is an arithmetic number, because the mean of its divisors is an integer number (1771560).

Almost surely, 2^72508345 is an apocalyptic number.

It is an amenable number.

72508345 is a deficient number, since it is larger than the sum of its proper divisors (40871495).

72508345 is a wasteful number, since it uses less digits than its factorization.

72508345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 72508345 is about 8515.1832041360. The cubic root of 72508345 is about 416.9935436741.

The spelling of 72508345 in words is "seventy-two million, five hundred eight thousand, three hundred forty-five".