1670909856 has 192 divisors, whose sum is σ = 5756728320. Its totient is φ = 411125760.

The previous prime is 1670909813. The next prime is 1670909879. The reversal of 1670909856 is 6589090761.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1670909799 and 1670909808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134500 + ... + 146396.

It is an arithmetic number, because the mean of its divisors is an integer number (29982960).

Almost surely, 2^1670909856 is an apocalyptic number.

1670909856 is a gapful number since it is divisible by the number (16) 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 1670909856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2878364160).

1670909856 is an abundant number, since it is smaller than the sum of its proper divisors (4085818464).

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

1670909856 is a wasteful number, since it uses less digits than its factorization.

1670909856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11947 (or 11939 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 1670909856 is about 40876.7642555034. The cubic root of 1670909856 is about 1186.6364202758.

The spelling of 1670909856 in words is "one billion, six hundred seventy million, nine hundred nine thousand, eight hundred fifty-six".