1128189140 has 24 divisors (see below), whose sum is σ = 2551443720. Its totient is φ = 416562048.

The previous prime is 1128189119. The next prime is 1128189149. The reversal of 1128189140 is 419818211.

It can be written as a sum of positive squares in 4 ways, for example, as 176836804 + 951352336 = 13298^2 + 30844^2 .

It is a super-2 number, since 2×1128189140² = 2545621471227879200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1128189140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128189149) 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, 2169335 + ... + 2169854.

It is an arithmetic number, because the mean of its divisors is an integer number (106310155).

Almost surely, 2^1128189140 is an apocalyptic number.

1128189140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128189140 is an abundant number, since it is smaller than the sum of its proper divisors (1423254580).

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

1128189140 is a wasteful number, since it uses less digits than its factorization.

1128189140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4339211 (or 4339209 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 1128189140 is about 33588.5269102412. The cubic root of 1128189140 is about 1041.0237515278.

The spelling of 1128189140 in words is "one billion, one hundred twenty-eight million, one hundred eighty-nine thousand, one hundred forty".