820898694 has 96 divisors (see below), whose sum is σ = 2233969920. Its totient is φ = 211636800.

The previous prime is 820898653. The next prime is 820898699. The reversal of 820898694 is 496898028.

It is a self number, because there is not a number n which added to its sum of digits gives 820898694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820898699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 190524 + ... + 194784.

It is an arithmetic number, because the mean of its divisors is an integer number (23270520).

Almost surely, 2^820898694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 820898694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1116984960).

820898694 is an abundant number, since it is smaller than the sum of its proper divisors (1413071226).

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

820898694 is a wasteful number, since it uses less digits than its factorization.

820898694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426 (or 4423 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 820898694 is about 28651.3297073626. The cubic root of 820898694 is about 936.3319759856.

The spelling of 820898694 in words is "eight hundred twenty million, eight hundred ninety-eight thousand, six hundred ninety-four".