1128831552 has 140 divisors (see below), whose sum is σ = 3543322860. Its totient is φ = 354115584.

The previous prime is 1128831547. The next prime is 1128831563. The reversal of 1128831552 is 2551388211.

1128831552 is a `hidden beast` number, since 1 + 1 + 28 + 83 + 1 + 552 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 624200256 + 504631296 = 24984^2 + 22464^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 81724 + ... + 94532.

It is an arithmetic number, because the mean of its divisors is an integer number (25309449).

Almost surely, 2^1128831552 is an apocalyptic number.

1128831552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1128831552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1771661430).

1128831552 is an abundant number, since it is smaller than the sum of its proper divisors (2414491308).

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

1128831552 is a wasteful number, since it uses less digits than its factorization.

1128831552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12850 (or 12831 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 1128831552 is about 33598.0885170570. The cubic root of 1128831552 is about 1041.2213068344.

The spelling of 1128831552 in words is "one billion, one hundred twenty-eight million, eight hundred thirty-one thousand, five hundred fifty-two".