999788285 has 16 divisors (see below), whose sum is σ = 1271926272. Its totient is φ = 753105600.

The previous prime is 999788281. The next prime is 999788299. The reversal of 999788285 is 582887999.

It is not a de Polignac number, because 999788285 - 2² = 999788281 is a prime.

It is a super-2 number, since 2×999788285² = 1999153229646482450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999788281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81431 + ... + 92900.

It is an arithmetic number, because the mean of its divisors is an integer number (79495392).

Almost surely, 2^999788285 is an apocalyptic number.

It is an amenable number.

999788285 is a deficient number, since it is larger than the sum of its proper divisors (272137987).

999788285 is a wasteful number, since it uses less digits than its factorization.

999788285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174404.

The product of its digits is 26127360, while the sum is 65.

The square root of 999788285 is about 31619.4289164115. The cubic root of 999788285 is about 999.9294233524.

The spelling of 999788285 in words is "nine hundred ninety-nine million, seven hundred eighty-eight thousand, two hundred eighty-five".