1685716480 has 160 divisors (see below), whose sum is σ = 4863260160. Its totient is φ = 547430400.

The previous prime is 1685716477. The next prime is 1685716493. The reversal of 1685716480 is 846175861.

It is a tau number, because it is divible by the number of its divisors (160).

It is a self number, because there is not a number n which added to its sum of digits gives 1685716480.

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, 338005 + ... + 342955.

It is an arithmetic number, because the mean of its divisors is an integer number (30395376).

Almost surely, 2^1685716480 is an apocalyptic number.

1685716480 is a gapful number since it is divisible by the number (10) 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 1685716480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2431630080).

1685716480 is an abundant number, since it is smaller than the sum of its proper divisors (3177543680).

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

1685716480 is an equidigital number, since it uses as much as digits as its factorization.

1685716480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000 (or 4984 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 1685716480 is about 41057.4777598430. The cubic root of 1685716480 is about 1190.1312097866.

The spelling of 1685716480 in words is "one billion, six hundred eighty-five million, seven hundred sixteen thousand, four hundred eighty".