999933648 has 160 divisors (see below), whose sum is σ = 3147227136. Its totient is φ = 267362304.

The previous prime is 999933647. The next prime is 999933667. The reversal of 999933648 is 846339999.

It is a junction number, because it is equal to n+sod(n) for n = 999933591 and 999933600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999933643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361840 + ... + 364592.

Almost surely, 2^999933648 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 999933648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1573613568).

999933648 is an abundant number, since it is smaller than the sum of its proper divisors (2147293488).

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

999933648 is a wasteful number, since it uses less digits than its factorization.

999933648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2841 (or 2835 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 60.

The square root of 999933648 is about 31621.7274670439. The cubic root of 999933648 is about 999.9778821775.

The spelling of 999933648 in words is "nine hundred ninety-nine million, nine hundred thirty-three thousand, six hundred forty-eight".