1128077687 has 24 divisors (see below), whose sum is σ = 1325458992. Its totient is φ = 951782400.

The previous prime is 1128077683. The next prime is 1128077723. The reversal of 1128077687 is 7867708211.

It is not a de Polignac number, because 1128077687 - 2² = 1128077683 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128077683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229637 + ... + 234497.

It is an arithmetic number, because the mean of its divisors is an integer number (55227458).

Almost surely, 2^1128077687 is an apocalyptic number.

1128077687 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1128077687 is a deficient number, since it is larger than the sum of its proper divisors (197381305).

1128077687 is a wasteful number, since it uses less digits than its factorization.

1128077687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4979 (or 4962 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 47.

The square root of 1128077687 is about 33586.8677759627. The cubic root of 1128077687 is about 1040.9894697344.

The spelling of 1128077687 in words is "one billion, one hundred twenty-eight million, seventy-seven thousand, six hundred eighty-seven".