1688490846 has 64 divisors (see below), whose sum is σ = 4341250560. Its totient is φ = 482417208.

The previous prime is 1688490763. The next prime is 1688490863. The reversal of 1688490846 is 6480948861.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1688490792 and 1688490801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3045 + ... + 58191.

It is an arithmetic number, because the mean of its divisors is an integer number (67832040).

Almost surely, 2^1688490846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1688490846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2170625280).

1688490846 is an abundant number, since it is smaller than the sum of its proper divisors (2652759714).

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

1688490846 is an frugal number, since it uses more digits than its factorization.

1688490846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55177 (or 55159 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The square root of 1688490846 is about 41091.2502365163. The cubic root of 1688490846 is about 1190.7837611594.

The spelling of 1688490846 in words is "one billion, six hundred eighty-eight million, four hundred ninety thousand, eight hundred forty-six".