72842217 has 8 divisors (see below), whose sum is σ = 110997696. Its totient is φ = 41624112.

The previous prime is 72842207. The next prime is 72842221. The reversal of 72842217 is 71224827.

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

It is not a de Polignac number, because 72842217 - 2⁴ = 72842201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72842207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1734318 + ... + 1734359.

It is an arithmetic number, because the mean of its divisors is an integer number (13874712).

Almost surely, 2^72842217 is an apocalyptic number.

It is an amenable number.

72842217 is a deficient number, since it is larger than the sum of its proper divisors (38155479).

72842217 is a wasteful number, since it uses less digits than its factorization.

72842217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468687.

The product of its digits is 12544, while the sum is 33.

The square root of 72842217 is about 8534.7651988792. The cubic root of 72842217 is about 417.6325934525.

The spelling of 72842217 in words is "seventy-two million, eight hundred forty-two thousand, two hundred seventeen".