816764 has 24 divisors (see below), whose sum is σ = 1564080. Its totient is φ = 370944.

The previous prime is 816763. The next prime is 816769. The reversal of 816764 is 467618.

816764 is nontrivially palindromic in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 816764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816763) 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, 5807 + ... + 5945.

It is an arithmetic number, because the mean of its divisors is an integer number (65170).

2⁸¹⁶⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

816764 is a deficient number, since it is larger than the sum of its proper divisors (747316).

816764 is a wasteful number, since it uses less digits than its factorization.

816764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 267 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 816764 is about 903.7499654219. The cubic root of 816764 is about 93.4757293520.

The spelling of 816764 in words is "eight hundred sixteen thousand, seven hundred sixty-four".