999402768 has 240 divisors, whose sum is σ = 3509775360. Its totient is φ = 258425856.

The previous prime is 999402763. The next prime is 999402779. The reversal of 999402768 is 867204999.

It is not an unprimeable number, because it can be changed into a prime (999402763) 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, 693793 + ... + 695231.

It is an arithmetic number, because the mean of its divisors is an integer number (14624064).

Almost surely, 2^999402768 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 999402768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1754887680).

999402768 is an abundant number, since it is smaller than the sum of its proper divisors (2510372592).

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

999402768 is a wasteful number, since it uses less digits than its factorization.

999402768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526 (or 1517 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 999402768 is about 31613.3321242795. The cubic root of 999402768 is about 999.8008830217.

The spelling of 999402768 in words is "nine hundred ninety-nine million, four hundred two thousand, seven hundred sixty-eight".