1129988 has 12 divisors (see below), whose sum is σ = 1997772. Its totient is φ = 559200.

The previous prime is 1129963. The next prime is 1129991. The reversal of 1129988 is 8899211.

It can be written as a sum of positive squares in 2 ways, for example, as 984064 + 145924 = 992^2 + 382^2 .

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, 995 + ... + 1802.

It is an arithmetic number, because the mean of its divisors is an integer number (166481).

2^1129988 is an apocalyptic number.

It is an amenable number.

1129988 is a deficient number, since it is larger than the sum of its proper divisors (867784).

1129988 is a wasteful number, since it uses less digits than its factorization.

1129988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902 (or 2900 counting only the distinct ones).

The product of its digits is 10368, while the sum is 38.

The square root of 1129988 is about 1063.0089369333. The cubic root of 1129988 is about 104.1576750283.

The spelling of 1129988 in words is "one million, one hundred twenty-nine thousand, nine hundred eighty-eight".