72196658 has 8 divisors (see below), whose sum is σ = 108358428. Its totient is φ = 36077184.

The previous prime is 72196643. The next prime is 72196667. The reversal of 72196658 is 85669127.

It can be written as a sum of positive squares in 2 ways, for example, as 68343289 + 3853369 = 8267^2 + 1963^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5891 + ... + 13382.

Almost surely, 2^72196658 is an apocalyptic number.

72196658 is a deficient number, since it is larger than the sum of its proper divisors (36161770).

72196658 is a wasteful number, since it uses less digits than its factorization.

72196658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21148.

The product of its digits is 181440, while the sum is 44.

The square root of 72196658 is about 8496.8616559292. The cubic root of 72196658 is about 416.3951842898.

It can be divided in two parts, 721 and 96658, that added together give a palindrome (97379).

The spelling of 72196658 in words is "seventy-two million, one hundred ninety-six thousand, six hundred fifty-eight".