1128779000 has 32 divisors (see below), whose sum is σ = 2641345200. Its totient is φ = 451511200.

The previous prime is 1128778933. The next prime is 1128779011. The reversal of 1128779000 is 9778211.

It is a congruent number.

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, 563390 + ... + 565389.

Almost surely, 2^1128779000 is an apocalyptic number.

1128779000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128779000 is an abundant number, since it is smaller than the sum of its proper divisors (1512566200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1128779000 is a wasteful number, since it uses less digits than its factorization.

1128779000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128800 (or 1128786 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 1128779000 is about 33597.3064396538. The cubic root of 1128779000 is about 1041.2051487958.

The spelling of 1128779000 in words is "one billion, one hundred twenty-eight million, seven hundred seventy-nine thousand".