999842256 has 240 divisors, whose sum is σ = 3373593600. Its totient is φ = 276030720.

The previous prime is 999842227. The next prime is 999842257. The reversal of 999842256 is 652248999.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999842257) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1530826 + ... + 1531478.

It is an arithmetic number, because the mean of its divisors is an integer number (14056640).

Almost surely, 2^999842256 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 999842256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1686796800).

999842256 is an abundant number, since it is smaller than the sum of its proper divisors (2373751344).

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

999842256 is a wasteful number, since it uses less digits than its factorization.

999842256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 696 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 999842256 is about 31620.2823516805. The cubic root of 999842256 is about 999.9474159016.

It can be divided in two parts, 999842 and 256, that multiplied together give a palindrome (255959552).

The spelling of 999842256 in words is "nine hundred ninety-nine million, eight hundred forty-two thousand, two hundred fifty-six".