816648 has 32 divisors (see below), whose sum is σ = 2333760. Its totient is φ = 233280.

The previous prime is 816593. The next prime is 816649. The reversal of 816648 is 846618.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 816648.

It is not an unprimeable number, because it can be changed into a prime (816649) by changing a digit.

816648 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 7 ways as a sum of consecutive naturals, for example, 2263 + ... + 2598.

It is an arithmetic number, because the mean of its divisors is an integer number (72930).

2⁸¹⁶⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

816648 is an abundant number, since it is smaller than the sum of its proper divisors (1517112).

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

816648 is a wasteful number, since it uses less digits than its factorization.

816648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4877 (or 4873 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 816648 is about 903.6857861005. The cubic root of 816648 is about 93.4713038802.

The spelling of 816648 in words is "eight hundred sixteen thousand, six hundred forty-eight".