999829220 has 24 divisors (see below), whose sum is σ = 2261152824. Its totient is φ = 369167616.

The previous prime is 999829213. The next prime is 999829231. The reversal of 999829220 is 22928999.

It can be written as a sum of positive squares in 4 ways, for example, as 3290596 + 996538624 = 1814^2 + 31568^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1922489 + ... + 1923008.

It is an arithmetic number, because the mean of its divisors is an integer number (94214701).

Almost surely, 2^999829220 is an apocalyptic number.

It is an amenable number.

999829220 is an abundant number, since it is smaller than the sum of its proper divisors (1261323604).

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

999829220 is a wasteful number, since it uses less digits than its factorization.

999829220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3845519 (or 3845517 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 999829220 is about 31620.0762174919. The cubic root of 999829220 is about 999.9430700924.

The spelling of 999829220 in words is "nine hundred ninety-nine million, eight hundred twenty-nine thousand, two hundred twenty".