823138112 has 28 divisors (see below), whose sum is σ = 1677565860. Its totient is φ = 400444416.

The previous prime is 823138103. The next prime is 823138139. The reversal of 823138112 is 211831328.

It can be written as a sum of positive squares in 2 ways, for example, as 600054016 + 223084096 = 24496^2 + 14936^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171437 + ... + 176172.

Almost surely, 2^823138112 is an apocalyptic number.

It is an amenable number.

823138112 is an abundant number, since it is smaller than the sum of its proper divisors (854427748).

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

823138112 is a wasteful number, since it uses less digits than its factorization.

823138112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347658 (or 347648 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 823138112 is about 28690.3836154207. The cubic root of 823138112 is about 937.1826432076.

The spelling of 823138112 in words is "eight hundred twenty-three million, one hundred thirty-eight thousand, one hundred twelve".