72686226 has 16 divisors (see below), whose sum is σ = 145593504. Its totient is φ = 24191904.

The previous prime is 72686213. The next prime is 72686231. The reversal of 72686226 is 62268627.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4771 + ... + 12966.

It is an arithmetic number, because the mean of its divisors is an integer number (9099594).

Almost surely, 2^72686226 is an apocalyptic number.

72686226 is an abundant number, since it is smaller than the sum of its proper divisors (72907278).

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

72686226 is a wasteful number, since it uses less digits than its factorization.

72686226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18425.

The product of its digits is 96768, while the sum is 39.

The square root of 72686226 is about 8525.6217368588. The cubic root of 72686226 is about 417.3342614877.

The spelling of 72686226 in words is "seventy-two million, six hundred eighty-six thousand, two hundred twenty-six".