1685327488 has 80 divisors (see below), whose sum is σ = 3645159210. Its totient is φ = 776156160.

The previous prime is 1685327477. The next prime is 1685327513. The reversal of 1685327488 is 8847235861.

It can be written as a sum of positive squares in 5 ways, for example, as 359785024 + 1325542464 = 18968^2 + 36408^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

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 9 ways as a sum of consecutive naturals, for example, 3655578 + ... + 3656038.

Almost surely, 2^1685327488 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 1685327488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1822579605).

1685327488 is an abundant number, since it is smaller than the sum of its proper divisors (1959831722).

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

1685327488 is an frugal number, since it uses more digits than its factorization.

1685327488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 476 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 52.

The square root of 1685327488 is about 41052.7403226630. The cubic root of 1685327488 is about 1190.0396587776.

The spelling of 1685327488 in words is "one billion, six hundred eighty-five million, three hundred twenty-seven thousand, four hundred eighty-eight".