72189626 has 16 divisors (see below), whose sum is σ = 114631200. Its totient is φ = 34000848.

The previous prime is 72189587. The next prime is 72189629. The reversal of 72189626 is 62698127.

It is a super-2 number, since 2×72189626² = 10422684204039752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72189629) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1496 + ... + 12108.

It is an arithmetic number, because the mean of its divisors is an integer number (7164450).

Almost surely, 2^72189626 is an apocalyptic number.

72189626 is a deficient number, since it is larger than the sum of its proper divisors (42441574).

72189626 is a wasteful number, since it uses less digits than its factorization.

72189626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10813.

The product of its digits is 72576, while the sum is 41.

The square root of 72189626 is about 8496.4478460119. The cubic root of 72189626 is about 416.3816647997.

The spelling of 72189626 in words is "seventy-two million, one hundred eighty-nine thousand, six hundred twenty-six".