1128487500 has 216 divisors, whose sum is σ = 4077676512. Its totient is φ = 257760000.

The previous prime is 1128487487. The next prime is 1128487517. The reversal of 1128487500 is 57848211.

1128487500 is a `hidden beast` number, since 1 + 128 + 487 + 50 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 786784 + ... + 788216.

It is an arithmetic number, because the mean of its divisors is an integer number (18878132).

Almost surely, 2^1128487500 is an apocalyptic number.

1128487500 is a gapful number since it is divisible by the number (10) 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 1128487500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2038838256).

1128487500 is an abundant number, since it is smaller than the sum of its proper divisors (2949189012).

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

1128487500 is a wasteful number, since it uses less digits than its factorization.

1128487500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 1128487500 is about 33592.9680141544. The cubic root of 1128487500 is about 1041.1155128762.

The spelling of 1128487500 in words is "one billion, one hundred twenty-eight million, four hundred eighty-seven thousand, five hundred".