1680805770 has 64 divisors (see below), whose sum is σ = 4614762240. Its totient is φ = 383804928.

The previous prime is 1680805703. The next prime is 1680805781. The reversal of 1680805770 is 775080861.

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

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, 247176 + ... + 253884.

It is an arithmetic number, because the mean of its divisors is an integer number (72105660).

Almost surely, 2^1680805770 is an apocalyptic number.

1680805770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1680805770 is an abundant number, since it is smaller than the sum of its proper divisors (2933956470).

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

1680805770 is a wasteful number, since it uses less digits than its factorization.

1680805770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7919.

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 1680805770 is about 40997.6312730382. The cubic root of 1680805770 is about 1188.9744170798.

The spelling of 1680805770 in words is "one billion, six hundred eighty million, eight hundred five thousand, seven hundred seventy".