72168994 has 8 divisors (see below), whose sum is σ = 111986460. Its totient is φ = 34840176.

The previous prime is 72168989. The next prime is 72169001. The reversal of 72168994 is 49986127.

It can be written as a sum of positive squares in 2 ways, for example, as 72165025 + 3969 = 8495^2 + 63^2 .

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, 622089 + ... + 622204.

Almost surely, 2^72168994 is an apocalyptic number.

72168994 is a deficient number, since it is larger than the sum of its proper divisors (39817466).

72168994 is a wasteful number, since it uses less digits than its factorization.

72168994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244324.

The product of its digits is 217728, while the sum is 46.

The square root of 72168994 is about 8495.2336047927. The cubic root of 72168994 is about 416.3419933328.

The spelling of 72168994 in words is "seventy-two million, one hundred sixty-eight thousand, nine hundred ninety-four".