1009109128 has 32 divisors (see below), whose sum is σ = 1914269760. Its totient is φ = 498657600.

The previous prime is 1009109083. The next prime is 1009109141. The reversal of 1009109128 is 8219019001.

It is a self number, because there is not a number n which added to its sum of digits gives 1009109128.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 576751 + ... + 578497.

It is an arithmetic number, because the mean of its divisors is an integer number (59820930).

Almost surely, 2^1009109128 is an apocalyptic number.

It is an amenable number.

1009109128 is a deficient number, since it is larger than the sum of its proper divisors (905160632).

1009109128 is a wasteful number, since it uses less digits than its factorization.

1009109128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2557 (or 2553 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 1009109128 is about 31766.4780547041. The cubic root of 1009109128 is about 1003.0272027962.

The spelling of 1009109128 in words is "one billion, nine million, one hundred nine thousand, one hundred twenty-eight".