1031688 has 96 divisors (see below), whose sum is σ = 3369600. Its totient is φ = 278784.

The previous prime is 1031677. The next prime is 1031707. The reversal of 1031688 is 8861301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11548 + ... + 11636.

It is an arithmetic number, because the mean of its divisors is an integer number (35100).

2^1031688 is an apocalyptic number.

1031688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1031688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1684800).

1031688 is an abundant number, since it is smaller than the sum of its proper divisors (2337912).

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

1031688 is a wasteful number, since it uses less digits than its factorization.

1031688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1031688 is about 1015.7204339778. The cubic root of 1031688 is about 101.0453020314.

Adding to 1031688 its reverse (8861301), we get a palindrome (9892989).

It can be divided in two parts, 10316 and 88, that added together give a square (10404 = 102²).

The spelling of 1031688 in words is "one million, thirty-one thousand, six hundred eighty-eight".