1128217864 has 16 divisors (see below), whose sum is σ = 2137218300. Its totient is φ = 558292992.

The previous prime is 1128217859. The next prime is 1128217897. The reversal of 1128217864 is 4687128211.

It can be written as a sum of positive squares in 2 ways, for example, as 982822500 + 145395364 = 31350^2 + 12058^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726169 + ... + 727720.

Almost surely, 2^1128217864 is an apocalyptic number.

It is an amenable number.

1128217864 is a deficient number, since it is larger than the sum of its proper divisors (1009000436).

1128217864 is a wasteful number, since it uses less digits than its factorization.

1128217864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453992 (or 1453988 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 1128217864 is about 33588.9544940000. The cubic root of 1128217864 is about 1041.0325863680.

The spelling of 1128217864 in words is "one billion, one hundred twenty-eight million, two hundred seventeen thousand, eight hundred sixty-four".