1143688 has 32 divisors (see below), whose sum is σ = 2640960. Its totient is φ = 452160.

The previous prime is 1143679. The next prime is 1143697. The reversal of 1143688 is 8863411.

It is an interprime number because it is at equal distance from previous prime (1143679) and next prime (1143697).

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58 + ... + 1513.

It is an arithmetic number, because the mean of its divisors is an integer number (82530).

2^1143688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320480).

1143688 is an abundant number, since it is smaller than the sum of its proper divisors (1497272).

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

1143688 is a wasteful number, since it uses less digits than its factorization.

1143688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597 (or 1593 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 1143688 is about 1069.4334948934. The cubic root of 1143688 is about 104.5769219133.

The spelling of 1143688 in words is "one million, one hundred forty-three thousand, six hundred eighty-eight".