72218867 has 8 divisors (see below), whose sum is σ = 86880000. Its totient is φ = 58643784.

The previous prime is 72218851. The next prime is 72218879. The reversal of 72218867 is 76881227.

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 72218867 - 2⁴ = 72218851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72218467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271367 + ... + 271632.

It is an arithmetic number, because the mean of its divisors is an integer number (10860000).

Almost surely, 2^72218867 is an apocalyptic number.

72218867 is a deficient number, since it is larger than the sum of its proper divisors (14661133).

72218867 is a wasteful number, since it uses less digits than its factorization.

72218867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543025.

The product of its digits is 75264, while the sum is 41.

The square root of 72218867 is about 8498.1684497308. The cubic root of 72218867 is about 416.4378768133.

The spelling of 72218867 in words is "seventy-two million, two hundred eighteen thousand, eight hundred sixty-seven".