72271276 has 36 divisors (see below), whose sum is σ = 160503336. Its totient is φ = 28156800.

The previous prime is 72271237. The next prime is 72271279. The reversal of 72271276 is 67217227.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72271279) 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 11 ways as a sum of consecutive naturals, for example, 14605 + ... + 18916.

It is an arithmetic number, because the mean of its divisors is an integer number (4458426).

Almost surely, 2^72271276 is an apocalyptic number.

It is an amenable number.

72271276 is an abundant number, since it is smaller than the sum of its proper divisors (88232060).

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

72271276 is a wasteful number, since it uses less digits than its factorization.

72271276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33550 (or 33541 counting only the distinct ones).

The product of its digits is 16464, while the sum is 34.

The square root of 72271276 is about 8501.2514372885. The cubic root of 72271276 is about 416.5385883321.

The spelling of 72271276 in words is "seventy-two million, two hundred seventy-one thousand, two hundred seventy-six".