1128939145 has 8 divisors (see below), whose sum is σ = 1434416904. Its totient is φ = 850024704.

The previous prime is 1128939143. The next prime is 1128939187. The reversal of 1128939145 is 5419398211.

It can be written as a sum of positive squares in 4 ways, for example, as 80928016 + 1048011129 = 8996^2 + 32373^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1128939145 - 2¹ = 1128939143 is a prime.

It is a super-2 number, since 2×1128939145² = 2549007186226662050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128939143) 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, 6640734 + ... + 6640903.

It is an arithmetic number, because the mean of its divisors is an integer number (179302113).

Almost surely, 2^1128939145 is an apocalyptic number.

It is an amenable number.

1128939145 is a deficient number, since it is larger than the sum of its proper divisors (305477759).

1128939145 is a wasteful number, since it uses less digits than its factorization.

1128939145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13281659.

The product of its digits is 77760, while the sum is 43.

The square root of 1128939145 is about 33599.6896563049. The cubic root of 1128939145 is about 1041.2543866341.

The spelling of 1128939145 in words is "one billion, one hundred twenty-eight million, nine hundred thirty-nine thousand, one hundred forty-five".