1129808 has 20 divisors (see below), whose sum is σ = 2205588. Its totient is φ = 560640.

The previous prime is 1129789. The next prime is 1129819. The reversal of 1129808 is 8089211.

It can be written as a sum of positive squares in 2 ways, for example, as 976144 + 153664 = 988^2 + 392^2 .

It is a super-2 number, since 2×1129808² = 2552932233728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3710 + ... + 4002.

2^1129808 is an apocalyptic number.

It is an amenable number.

1129808 is a deficient number, since it is larger than the sum of its proper divisors (1075780).

1129808 is a wasteful number, since it uses less digits than its factorization.

1129808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1129808 is about 1062.9242682336. The cubic root of 1129808 is about 104.1521441799.

It can be divided in two parts, 112980 and 8, that multiplied together give a triangular number (903840 = T₁₃₄₄).

The spelling of 1129808 in words is "one million, one hundred twenty-nine thousand, eight hundred eight".