72321118 has 8 divisors (see below), whose sum is σ = 108519840. Its totient is φ = 36147840.

The previous prime is 72321091. The next prime is 72321121. The reversal of 72321118 is 81112327.

It is a happy number.

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 = 72321092 and 72321101.

It is a congruent number.

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, 4363 + ... + 12793.

It is an arithmetic number, because the mean of its divisors is an integer number (13564980).

Almost surely, 2^72321118 is an apocalyptic number.

72321118 is a deficient number, since it is larger than the sum of its proper divisors (36198722).

72321118 is a wasteful number, since it uses less digits than its factorization.

72321118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12722.

The product of its digits is 672, while the sum is 25.

The square root of 72321118 is about 8504.1823828044. The cubic root of 72321118 is about 416.6343218270.

The spelling of 72321118 in words is "seventy-two million, three hundred twenty-one thousand, one hundred eighteen".