771216 has 20 divisors (see below), whose sum is σ = 1992432. Its totient is φ = 257056.

The previous prime is 771209. The next prime is 771217. The reversal of 771216 is 612177.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (771217) by changing a digit.

771216 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7986 + ... + 8081.

2⁷⁷¹²¹⁶ is an apocalyptic number.

It is an amenable number.

771216 is an abundant number, since it is smaller than the sum of its proper divisors (1221216).

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

771216 is a wasteful number, since it uses less digits than its factorization.

771216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16078 (or 16072 counting only the distinct ones).

The product of its digits is 588, while the sum is 24.

The square root of 771216 is about 878.1890457071. The cubic root of 771216 is about 91.7047878176.

The spelling of 771216 in words is "seven hundred seventy-one thousand, two hundred sixteen".