72672218 has 8 divisors (see below), whose sum is σ = 111954612. Its totient is φ = 35354016.

The previous prime is 72672209. The next prime is 72672241. The reversal of 72672218 is 81227627.

It can be written as a sum of positive squares in 2 ways, for example, as 63952009 + 8720209 = 7997^2 + 2953^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490955 + ... + 491102.

Almost surely, 2^72672218 is an apocalyptic number.

72672218 is a deficient number, since it is larger than the sum of its proper divisors (39282394).

72672218 is a wasteful number, since it uses less digits than its factorization.

72672218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982096.

The product of its digits is 18816, while the sum is 35.

The square root of 72672218 is about 8524.8001736111. The cubic root of 72672218 is about 417.3074503836.

The spelling of 72672218 in words is "seventy-two million, six hundred seventy-two thousand, two hundred eighteen".