72005218 has 8 divisors (see below), whose sum is σ = 109529280. Its totient is φ = 35495460.

The previous prime is 72005207. The next prime is 72005221. The reversal of 72005218 is 81250027.

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

It is a junction number, because it is equal to n+sod(n) for n = 72005192 and 72005201.

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, 253398 + ... + 253681.

It is an arithmetic number, because the mean of its divisors is an integer number (13691160).

Almost surely, 2^72005218 is an apocalyptic number.

72005218 is a deficient number, since it is larger than the sum of its proper divisors (37524062).

72005218 is a wasteful number, since it uses less digits than its factorization.

72005218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507152.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 72005218 is about 8485.5888422666. The cubic root of 72005218 is about 416.0268142541.

The spelling of 72005218 in words is "seventy-two million, five thousand, two hundred eighteen".