72771216 has 80 divisors (see below), whose sum is σ = 226176000. Its totient is φ = 19695744.

The previous prime is 72771211. The next prime is 72771233. The reversal of 72771216 is 61217727.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (72771211) 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 15 ways as a sum of consecutive naturals, for example, 685 + ... + 12083.

It is an arithmetic number, because the mean of its divisors is an integer number (2827200).

Almost surely, 2^72771216 is an apocalyptic number.

72771216 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72771216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113088000).

72771216 is an abundant number, since it is smaller than the sum of its proper divisors (153404784).

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

72771216 is a wasteful number, since it uses less digits than its factorization.

72771216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11436 (or 11430 counting only the distinct ones).

The product of its digits is 8232, while the sum is 33.

The square root of 72771216 is about 8530.6046679002. The cubic root of 72771216 is about 417.4968572797.

The spelling of 72771216 in words is "seventy-two million, seven hundred seventy-one thousand, two hundred sixteen".