1099979328 has 112 divisors (see below), whose sum is σ = 3380906624. Its totient is φ = 309104640.

The previous prime is 1099979323. The next prime is 1099979341. The reversal of 1099979328 is 8239799901.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (1099979323) 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, 75276 + ... + 88692.

Almost surely, 2^1099979328 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 1099979328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1690453312).

1099979328 is an abundant number, since it is smaller than the sum of its proper divisors (2280927296).

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

1099979328 is a wasteful number, since it uses less digits than its factorization.

1099979328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13500 (or 13490 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 1099979328 is about 33165.9362599641. The cubic root of 1099979328 is about 1032.2736489630.

The spelling of 1099979328 in words is "one billion, ninety-nine million, nine hundred seventy-nine thousand, three hundred twenty-eight".