823951616 has 36 divisors (see below), whose sum is σ = 1657700352. Its totient is φ = 408715776.

The previous prime is 823951607. The next prime is 823951627. The reversal of 823951616 is 616159328.

It is a super-2 number, since 2×823951616² = 1357792531018022912, which contains 22 as substring.

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, 19841 + ... + 45183.

It is an arithmetic number, because the mean of its divisors is an integer number (46047232).

Almost surely, 2^823951616 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 823951616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828850176).

823951616 is an abundant number, since it is smaller than the sum of its proper divisors (833748736).

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

823951616 is a wasteful number, since it uses less digits than its factorization.

823951616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25486 (or 25472 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 823951616 is about 28704.5574081887. The cubic root of 823951616 is about 937.4912794685.

The spelling of 823951616 in words is "eight hundred twenty-three million, nine hundred fifty-one thousand, six hundred sixteen".