1128729875 has 96 divisors (see below), whose sum is σ = 1849910400. Its totient is φ = 670924800.

The previous prime is 1128729859. The next prime is 1128729883. The reversal of 1128729875 is 5789278211.

1128729875 = T₃₅₇₀ + T₃₅₇₁ + ... + T₃₇₃₈.

It is not a de Polignac number, because 1128729875 - 2⁴ = 1128729859 is a prime.

It is a super-2 number, since 2×1128729875² = 2548062261435031250, which contains 22 as substring.

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 95 ways as a sum of consecutive naturals, for example, 2513651 + ... + 2514099.

It is an arithmetic number, because the mean of its divisors is an integer number (19269900).

Almost surely, 2^1128729875 is an apocalyptic number.

1128729875 is a deficient number, since it is larger than the sum of its proper divisors (721180525).

1128729875 is a wasteful number, since it uses less digits than its factorization.

1128729875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 491 counting only the distinct ones).

The product of its digits is 564480, while the sum is 50.

The square root of 1128729875 is about 33596.5753463058. The cubic root of 1128729875 is about 1041.1900439953.

The spelling of 1128729875 in words is "one billion, one hundred twenty-eight million, seven hundred twenty-nine thousand, eight hundred seventy-five".