867771216 has 120 divisors (see below), whose sum is σ = 2625493416. Its totient is φ = 265973760.

The previous prime is 867771181. The next prime is 867771217. The reversal of 867771216 is 612177768.

It can be written as a sum of positive squares in 4 ways, for example, as 31404816 + 836366400 = 5604^2 + 28920^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867771217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 585196 + ... + 586676.

Almost surely, 2^867771216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 867771216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1312746708).

867771216 is an abundant number, since it is smaller than the sum of its proper divisors (1757722200).

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

867771216 is a wasteful number, since it uses less digits than its factorization.

867771216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821 (or 1812 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 867771216 is about 29457.9567519541. The cubic root of 867771216 is about 953.8243680742.

The spelling of 867771216 in words is "eight hundred sixty-seven million, seven hundred seventy-one thousand, two hundred sixteen".