1128156903 has 12 divisors (see below), whose sum is σ = 1689914408. Its totient is φ = 752104440.

The previous prime is 1128156889. The next prime is 1128156947. The reversal of 1128156903 is 3096518211.

1128156903 is a `hidden beast` number, since 1 + 12 + 81 + 569 + 0 + 3 = 666.

It is not a de Polignac number, because 1128156903 - 2¹² = 1128152807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128156203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2321068 + ... + 2321553.

Almost surely, 2^1128156903 is an apocalyptic number.

1128156903 is a deficient number, since it is larger than the sum of its proper divisors (561757505).

1128156903 is an frugal number, since it uses more digits than its factorization.

1128156903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4642636 (or 4642624 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1128156903 is about 33588.0470256906. The cubic root of 1128156903 is about 1041.0138359911.

The spelling of 1128156903 in words is "one billion, one hundred twenty-eight million, one hundred fifty-six thousand, nine hundred three".