823381266 has 16 divisors (see below), whose sum is σ = 1699884288. Its totient is φ = 265606800.

The previous prime is 823381261. The next prime is 823381271. The reversal of 823381266 is 662183328.

It is an interprime number because it is at equal distance from previous prime (823381261) and next prime (823381271).

It is not an unprimeable number, because it can be changed into a prime (823381261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2213205 + ... + 2213576.

It is an arithmetic number, because the mean of its divisors is an integer number (106242768).

Almost surely, 2^823381266 is an apocalyptic number.

823381266 is an abundant number, since it is smaller than the sum of its proper divisors (876503022).

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

823381266 is a wasteful number, since it uses less digits than its factorization.

823381266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426817.

The product of its digits is 82944, while the sum is 39.

The square root of 823381266 is about 28694.6208547874. The cubic root of 823381266 is about 937.2749149946.

The spelling of 823381266 in words is "eight hundred twenty-three million, three hundred eighty-one thousand, two hundred sixty-six".