999897330 has 64 divisors (see below), whose sum is σ = 2564369280. Its totient is φ = 248638464.

The previous prime is 999897329. The next prime is 999897373. The reversal of 999897330 is 33798999.

It is a super-2 number, since 2×999897330² = 1999589341082257800, which contains 22 as substring.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 46597 + ... + 64583.

It is an arithmetic number, because the mean of its divisors is an integer number (40068270).

Almost surely, 2^999897330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999897330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1282184640).

999897330 is an abundant number, since it is smaller than the sum of its proper divisors (1564471950).

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

999897330 is a wasteful number, since it uses less digits than its factorization.

999897330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18123.

The product of its (nonzero) digits is 3306744, while the sum is 57.

The square root of 999897330 is about 31621.1532047773. The cubic root of 999897330 is about 999.9657754954.

The spelling of 999897330 in words is "nine hundred ninety-nine million, eight hundred ninety-seven thousand, three hundred thirty".