816772 has 24 divisors (see below), whose sum is σ = 1643040. Its totient is φ = 351360.

The previous prime is 816769. The next prime is 816779. The reversal of 816772 is 277618.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (816779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348 + ... + 1324.

It is an arithmetic number, because the mean of its divisors is an integer number (68460).

2⁸¹⁶⁷⁷² is an apocalyptic number.

It is an amenable number.

816772 is an abundant number, since it is smaller than the sum of its proper divisors (826268).

It is a weird number, because it is abundant, but not a pseudoperfect number.

816772 is a wasteful number, since it uses less digits than its factorization.

816772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011 (or 1009 counting only the distinct ones).

The product of its digits is 4704, while the sum is 31.

The square root of 816772 is about 903.7543914140. The cubic root of 816772 is about 93.4760345415.

The spelling of 816772 in words is "eight hundred sixteen thousand, seven hundred seventy-two".