823137612 has 96 divisors (see below), whose sum is σ = 2143325184. Its totient is φ = 243777600.

The previous prime is 823137587. The next prime is 823137613. The reversal of 823137612 is 216731328.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (823137613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1441287 + ... + 1441857.

It is an arithmetic number, because the mean of its divisors is an integer number (22326304).

Almost surely, 2^823137612 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 823137612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1071662592).

823137612 is an abundant number, since it is smaller than the sum of its proper divisors (1320187572).

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

823137612 is a wasteful number, since it uses less digits than its factorization.

823137612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819 (or 817 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 823137612 is about 28690.3749016983. The cubic root of 823137612 is about 937.1824534495.

The spelling of 823137612 in words is "eight hundred twenty-three million, one hundred thirty-seven thousand, six hundred twelve".