1128991002 has 16 divisors (see below), whose sum is σ = 2260122912. Its totient is φ = 375973520.

The previous prime is 1128990997. The next prime is 1128991009. The reversal of 1128991002 is 2001998211.

It is not an unprimeable number, because it can be changed into a prime (1128991009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82308 + ... + 95039.

It is an arithmetic number, because the mean of its divisors is an integer number (141257682).

Almost surely, 2^1128991002 is an apocalyptic number.

1128991002 is an abundant number, since it is smaller than the sum of its proper divisors (1131131910).

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

1128991002 is a wasteful number, since it uses less digits than its factorization.

1128991002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178413.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 1128991002 is about 33600.4613361186. The cubic root of 1128991002 is about 1041.2703294781.

The spelling of 1128991002 in words is "one billion, one hundred twenty-eight million, nine hundred ninety-one thousand, two".