999229620 has 96 divisors (see below), whose sum is σ = 2837866752. Its totient is φ = 262678528.

The previous prime is 999229529. The next prime is 999229633. The reversal of 999229620 is 26922999.

999229620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 999229620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1986289 + ... + 1986791.

It is an arithmetic number, because the mean of its divisors is an integer number (29561112).

Almost surely, 2^999229620 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 999229620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1418933376).

999229620 is an abundant number, since it is smaller than the sum of its proper divisors (1838637132).

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

999229620 is a wasteful number, since it uses less digits than its factorization.

999229620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 999229620 is about 31610.5934775037. The cubic root of 999229620 is about 999.7431406956.

The spelling of 999229620 in words is "nine hundred ninety-nine million, two hundred twenty-nine thousand, six hundred twenty".