1688094 has 32 divisors (see below), whose sum is σ = 3843840. Its totient is φ = 548856.

The previous prime is 1688081. The next prime is 1688101. The reversal of 1688094 is 4908861.

It is a happy number.

It is a super-2 number, since 2×1688094² = 5699322705672, which contains 22 as substring.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1959 + ... + 2685.

It is an arithmetic number, because the mean of its divisors is an integer number (120120).

2^1688094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1688094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1921920).

1688094 is an abundant number, since it is smaller than the sum of its proper divisors (2155746).

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

1688094 is a wasteful number, since it uses less digits than its factorization.

1688094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1688094 is about 1299.2667162673. The cubic root of 1688094 is about 119.0690463881.

The spelling of 1688094 in words is "one million, six hundred eighty-eight thousand, ninety-four".