72218682 has 16 divisors (see below), whose sum is σ = 160486080. Its totient is φ = 24072876.

The previous prime is 72218659. The next prime is 72218683. The reversal of 72218682 is 28681227.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (72218683) 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, 668638 + ... + 668745.

It is an arithmetic number, because the mean of its divisors is an integer number (10030380).

Almost surely, 2^72218682 is an apocalyptic number.

72218682 is an abundant number, since it is smaller than the sum of its proper divisors (88267398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72218682 is a wasteful number, since it uses less digits than its factorization.

72218682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337394 (or 1337388 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 72218682 is about 8498.1575650255. The cubic root of 72218682 is about 416.4375212226.

It can be divided in two parts, 72218 and 682, that added together give a square (72900 = 270²).

The spelling of 72218682 in words is "seventy-two million, two hundred eighteen thousand, six hundred eighty-two".