821116736 has 28 divisors (see below), whose sum is σ = 1777532640. Its totient is φ = 373234560.

The previous prime is 821116733. The next prime is 821116739. The reversal of 821116736 is 637611128.

It is an interprime number because it is at equal distance from previous prime (821116733) and next prime (821116739).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 821116696 and 821116705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821116733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582476 + ... + 583883.

Almost surely, 2^821116736 is an apocalyptic number.

It is an amenable number.

821116736 is an abundant number, since it is smaller than the sum of its proper divisors (956415904).

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

821116736 is a wasteful number, since it uses less digits than its factorization.

821116736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166382 (or 1166372 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 821116736 is about 28655.1345486285. The cubic root of 821116736 is about 936.4148695367.

The spelling of 821116736 in words is "eight hundred twenty-one million, one hundred sixteen thousand, seven hundred thirty-six".