72772226 has 8 divisors (see below), whose sum is σ = 110124684. Its totient is φ = 36064000.

The previous prime is 72772177. The next prime is 72772243. The reversal of 72772226 is 62227727.

It can be written as a sum of positive squares in 2 ways, for example, as 45576001 + 27196225 = 6751^2 + 5215^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 160775 + ... + 161226.

Almost surely, 2^72772226 is an apocalyptic number.

72772226 is a deficient number, since it is larger than the sum of its proper divisors (37352458).

72772226 is a wasteful number, since it uses less digits than its factorization.

72772226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322116.

The product of its digits is 32928, while the sum is 35.

The square root of 72772226 is about 8530.6638663119. The cubic root of 72772226 is about 417.4987887663.

The spelling of 72772226 in words is "seventy-two million, seven hundred seventy-two thousand, two hundred twenty-six".