1680236880 has 160 divisors (see below), whose sum is σ = 6266265600. Its totient is φ = 363833856.

The previous prime is 1680236879. The next prime is 1680236881. The reversal of 1680236880 is 886320861.

It is an interprime number because it is at equal distance from previous prime (1680236879) and next prime (1680236881).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680236881) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 5601 + ... + 58239.

It is an arithmetic number, because the mean of its divisors is an integer number (39164160).

Almost surely, 2^1680236880 is an apocalyptic number.

1680236880 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 1680236880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3133132800).

1680236880 is an abundant number, since it is smaller than the sum of its proper divisors (4586028720).

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

1680236880 is a wasteful number, since it uses less digits than its factorization.

1680236880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52681 (or 52675 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 1680236880 is about 40990.6926021018. The cubic root of 1680236880 is about 1188.8402607932.

The spelling of 1680236880 in words is "one billion, six hundred eighty million, two hundred thirty-six thousand, eight hundred eighty".