823609612 has 48 divisors (see below), whose sum is σ = 1732534272. Its totient is φ = 335125440.

The previous prime is 823609607. The next prime is 823609621. The reversal of 823609612 is 216906328.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37053 + ... + 54955.

It is an arithmetic number, because the mean of its divisors is an integer number (36094464).

Almost surely, 2^823609612 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 823609612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866267136).

823609612 is an abundant number, since it is smaller than the sum of its proper divisors (908924660).

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

823609612 is a wasteful number, since it uses less digits than its factorization.

823609612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17998 (or 17996 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 823609612 is about 28698.5994780233. The cubic root of 823609612 is about 937.3615509209.

The spelling of 823609612 in words is "eight hundred twenty-three million, six hundred nine thousand, six hundred twelve".