72198985 has 8 divisors (see below), whose sum is σ = 88273800. Its totient is φ = 56669184.

The previous prime is 72198979. The next prime is 72199013. The reversal of 72198985 is 58989127.

It can be written as a sum of positive squares in 4 ways, for example, as 21233664 + 50965321 = 4608^2 + 7139^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 72198985 - 2¹¹ = 72196937 is a prime.

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, 135960 + ... + 136489.

It is an arithmetic number, because the mean of its divisors is an integer number (11034225).

Almost surely, 2^72198985 is an apocalyptic number.

It is an amenable number.

72198985 is a deficient number, since it is larger than the sum of its proper divisors (16074815).

72198985 is a wasteful number, since it uses less digits than its factorization.

72198985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272507.

The product of its digits is 362880, while the sum is 49.

The square root of 72198985 is about 8496.9985877367. The cubic root of 72198985 is about 416.3996579095.

The spelling of 72198985 in words is "seventy-two million, one hundred ninety-eight thousand, nine hundred eighty-five".