72146218 has 8 divisors (see below), whose sum is σ = 108461700. Its totient is φ = 35992320.

The previous prime is 72146201. The next prime is 72146227. The reversal of 72146218 is 81264127.

It can be written as a sum of positive squares in 2 ways, for example, as 66961489 + 5184729 = 8183^2 + 2277^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 72146218.

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 3 ways as a sum of consecutive naturals, for example, 39273 + ... + 41068.

Almost surely, 2^72146218 is an apocalyptic number.

72146218 is a deficient number, since it is larger than the sum of its proper divisors (36315482).

72146218 is a wasteful number, since it uses less digits than its factorization.

72146218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80792.

The product of its digits is 5376, while the sum is 31.

The square root of 72146218 is about 8493.8929826082. The cubic root of 72146218 is about 416.2981905747.

It can be divided in two parts, 7 and 2146218, that added together give a square (2146225 = 1465²).

The spelling of 72146218 in words is "seventy-two million, one hundred forty-six thousand, two hundred eighteen".