72818218 has 8 divisors (see below), whose sum is σ = 119157120. Its totient is φ = 33099180.

The previous prime is 72818209. The next prime is 72818227. The reversal of 72818218 is 81281827.

It is an interprime number because it is at equal distance from previous prime (72818209) and next prime (72818227).

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654938 + ... + 1654981.

It is an arithmetic number, because the mean of its divisors is an integer number (14894640).

Almost surely, 2^72818218 is an apocalyptic number.

72818218 is a deficient number, since it is larger than the sum of its proper divisors (46338902).

72818218 is a wasteful number, since it uses less digits than its factorization.

72818218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3309932.

The product of its digits is 14336, while the sum is 37.

The square root of 72818218 is about 8533.3591275652. The cubic root of 72818218 is about 417.5867232326.

The spelling of 72818218 in words is "seventy-two million, eight hundred eighteen thousand, two hundred eighteen".