820898712 has 96 divisors (see below), whose sum is σ = 2319342480. Its totient is φ = 272004480.

The previous prime is 820898699. The next prime is 820898731. The reversal of 820898712 is 217898028.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 350698 + ... + 353030.

Almost surely, 2^820898712 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 820898712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159671240).

820898712 is an abundant number, since it is smaller than the sum of its proper divisors (1498443768).

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

820898712 is a wasteful number, since it uses less digits than its factorization.

820898712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535 (or 2519 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 820898712 is about 28651.3300214842. The cubic root of 820898712 is about 936.3319828293.

The spelling of 820898712 in words is "eight hundred twenty million, eight hundred ninety-eight thousand, seven hundred twelve".