823552136 has 48 divisors (see below), whose sum is σ = 1712547900. Its totient is φ = 370979840.

The previous prime is 823552129. The next prime is 823552153. The reversal of 823552136 is 631255328.

It can be written as a sum of positive squares in 2 ways, for example, as 691164100 + 132388036 = 26290^2 + 11506^2 .

It is a junction number, because it is equal to n+sod(n) for n = 823552096 and 823552105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105620 + ... + 113148.

Almost surely, 2^823552136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 823552136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (856273950).

823552136 is an abundant number, since it is smaller than the sum of its proper divisors (888995764).

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

823552136 is a wasteful number, since it uses less digits than its factorization.

823552136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7670 (or 7655 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 823552136 is about 28697.5980876449. The cubic root of 823552136 is about 937.3397456688.

The spelling of 823552136 in words is "eight hundred twenty-three million, five hundred fifty-two thousand, one hundred thirty-six".