72164386 has 16 divisors (see below), whose sum is σ = 129089664. Its totient is φ = 29582784.

The previous prime is 72164381. The next prime is 72164401. The reversal of 72164386 is 68346127.

It is a super-3 number, since 3×72164386³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (72164381) 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, 111735 + ... + 112378.

It is an arithmetic number, because the mean of its divisors is an integer number (8068104).

Almost surely, 2^72164386 is an apocalyptic number.

72164386 is a deficient number, since it is larger than the sum of its proper divisors (56925278).

72164386 is a wasteful number, since it uses less digits than its factorization.

72164386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224145.

The product of its digits is 48384, while the sum is 37.

The square root of 72164386 is about 8494.9623895577. The cubic root of 72164386 is about 416.3331319801. Note that the first 3 decimals are identical.

The spelling of 72164386 in words is "seventy-two million, one hundred sixty-four thousand, three hundred eighty-six".