1128403172 has 24 divisors (see below), whose sum is σ = 2128396536. Its totient is φ = 520363008.

The previous prime is 1128403147. The next prime is 1128403223. The reversal of 1128403172 is 2713048211.

It can be written as a sum of positive squares in 4 ways, for example, as 6421156 + 1121982016 = 2534^2 + 33496^2 .

It is a super-3 number, since 3×1128403172³ (a number of 28 digits) contains 333 as substring.

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, 57908 + ... + 74900.

It is an arithmetic number, because the mean of its divisors is an integer number (88683189).

Almost surely, 2^1128403172 is an apocalyptic number.

It is an amenable number.

1128403172 is a deficient number, since it is larger than the sum of its proper divisors (999993364).

1128403172 is a wasteful number, since it uses less digits than its factorization.

1128403172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18287 (or 18285 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1128403172 is about 33591.7128470699. The cubic root of 1128403172 is about 1041.0895792332.

The spelling of 1128403172 in words is "one billion, one hundred twenty-eight million, four hundred three thousand, one hundred seventy-two".