999393864 has 64 divisors (see below), whose sum is σ = 2909312640. Its totient is φ = 280151040.

The previous prime is 999393851. The next prime is 999393869. The reversal of 999393864 is 468393999.

It is a junction number, because it is equal to n+sod(n) for n = 999393798 and 999393807.

It is not an unprimeable number, because it can be changed into a prime (999393869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47217 + ... + 65024.

It is an arithmetic number, because the mean of its divisors is an integer number (45458010).

Almost surely, 2^999393864 is an apocalyptic number.

It is an amenable number.

999393864 is an abundant number, since it is smaller than the sum of its proper divisors (1909918776).

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

999393864 is a wasteful number, since it uses less digits than its factorization.

999393864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112310 (or 112306 counting only the distinct ones).

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

The square root of 999393864 is about 31613.1912973050. The cubic root of 999393864 is about 999.7979138306.

The spelling of 999393864 in words is "nine hundred ninety-nine million, three hundred ninety-three thousand, eight hundred sixty-four".