999218928 has 40 divisors (see below), whose sum is σ = 2733159888. Its totient is φ = 313480192.

The previous prime is 999218921. The next prime is 999218951. The reversal of 999218928 is 829812999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999218921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611451 + ... + 613082.

Almost surely, 2^999218928 is an apocalyptic number.

It is an amenable number.

999218928 is an abundant number, since it is smaller than the sum of its proper divisors (1733940960).

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

999218928 is a wasteful number, since it uses less digits than its factorization.

999218928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224561 (or 1224555 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 57.

The square root of 999218928 is about 31610.4243565315. The cubic root of 999218928 is about 999.7395748513.

It can be divided in two parts, 9992 and 18928, that added together give a triangular number (28920 = T₂₄₀).

The spelling of 999218928 in words is "nine hundred ninety-nine million, two hundred eighteen thousand, nine hundred twenty-eight".