1128668356 has 12 divisors (see below), whose sum is σ = 1981402668. Its totient is φ = 562553312.

The previous prime is 1128668353. The next prime is 1128668393. The reversal of 1128668356 is 6538668211.

It can be written as a sum of positive squares in 2 ways, for example, as 227708100 + 900960256 = 15090^2 + 30016^2 .

It is not an unprimeable number, because it can be changed into a prime (1128668353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443791 + ... + 446326.

It is an arithmetic number, because the mean of its divisors is an integer number (165116889).

Almost surely, 2^1128668356 is an apocalyptic number.

It is an amenable number.

1128668356 is a deficient number, since it is larger than the sum of its proper divisors (852734312).

1128668356 is a wasteful number, since it uses less digits than its factorization.

1128668356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890438 (or 890436 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 1128668356 is about 33595.6597792036. The cubic root of 1128668356 is about 1041.1711277085.

The spelling of 1128668356 in words is "one billion, one hundred twenty-eight million, six hundred sixty-eight thousand, three hundred fifty-six".