72278168 has 32 divisors (see below), whose sum is σ = 141501360. Its totient is φ = 34577280.

The previous prime is 72278161. The next prime is 72278177. The reversal of 72278168 is 86187227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72278161) by changing a digit.

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, 16055 + ... + 20057.

Almost surely, 2^72278168 is an apocalyptic number.

It is an amenable number.

72278168 is a deficient number, since it is larger than the sum of its proper divisors (69223192).

72278168 is a wasteful number, since it uses less digits than its factorization.

72278168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107 (or 4103 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 72278168 is about 8501.6567797106. The cubic root of 72278168 is about 416.5518286901.

The spelling of 72278168 in words is "seventy-two million, two hundred seventy-eight thousand, one hundred sixty-eight".