1128729874 has 4 divisors (see below), whose sum is σ = 1693094814. Its totient is φ = 564364936.

The previous prime is 1128729859. The next prime is 1128729883. The reversal of 1128729874 is 4789278211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 806276025 + 322453849 = 28395^2 + 17957^2 .

It is a super-2 number, since 2×1128729874² = 2548062256920111752, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282182467 + ... + 282182470.

Almost surely, 2^1128729874 is an apocalyptic number.

1128729874 is a deficient number, since it is larger than the sum of its proper divisors (564364940).

1128729874 is an equidigital number, since it uses as much as digits as its factorization.

1128729874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564364939.

The product of its digits is 451584, while the sum is 49.

The square root of 1128729874 is about 33596.5753314233. The cubic root of 1128729874 is about 1041.1900436878.

The spelling of 1128729874 in words is "one billion, one hundred twenty-eight million, seven hundred twenty-nine thousand, eight hundred seventy-four".