72509170 has 16 divisors (see below), whose sum is σ = 130632768. Its totient is φ = 28977840.

The previous prime is 72509167. The next prime is 72509183. The reversal of 72509170 is 7190527.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11965 + ... + 16975.

It is an arithmetic number, because the mean of its divisors is an integer number (8164548).

Almost surely, 2^72509170 is an apocalyptic number.

72509170 is a deficient number, since it is larger than the sum of its proper divisors (58123598).

72509170 is a wasteful number, since it uses less digits than its factorization.

72509170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6465.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 72509170 is about 8515.2316468784. The cubic root of 72509170 is about 416.9951251857.

Adding to 72509170 its reverse (7190527), we get a palindrome (79699697).

The spelling of 72509170 in words is "seventy-two million, five hundred nine thousand, one hundred seventy".