1127988 has 18 divisors (see below), whose sum is σ = 2851394. Its totient is φ = 375984.

The previous prime is 1127983. The next prime is 1127993. The reversal of 1127988 is 8897211.

It is an interprime number because it is at equal distance from previous prime (1127983) and next prime (1127993).

It can be written as a sum of positive squares in only one way, i.e., 1127844 + 144 = 1062^2 + 12^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 31333 = 1127988 / (1 + 1 + 2 + 7 + 9 + 8 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1127981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15631 + ... + 15702.

2^1127988 is an apocalyptic number.

1127988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1127988 is an abundant number, since it is smaller than the sum of its proper divisors (1723406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1127988 is a wasteful number, since it uses less digits than its factorization.

1127988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31343 (or 31338 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 1127988 is about 1062.0677944463. The cubic root of 1127988 is about 104.0961881298.

It can be divided in two parts, 112 and 7988, that added together give a square (8100 = 90²).

The spelling of 1127988 in words is "one million, one hundred twenty-seven thousand, nine hundred eighty-eight".