1680920448 has 64 divisors (see below), whose sum is σ = 4508400000. Its totient is φ = 554853888.

The previous prime is 1680920413. The next prime is 1680920473. The reversal of 1680920448 is 8440290861.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18303 + ... + 60801.

It is an arithmetic number, because the mean of its divisors is an integer number (70443750).

Almost surely, 2^1680920448 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 1680920448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2254200000).

1680920448 is an abundant number, since it is smaller than the sum of its proper divisors (2827479552).

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

1680920448 is a wasteful number, since it uses less digits than its factorization.

1680920448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42619 (or 42607 counting only the distinct ones).

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

The square root of 1680920448 is about 40999.0298421804. The cubic root of 1680920448 is about 1189.0014569099.

The spelling of 1680920448 in words is "one billion, six hundred eighty million, nine hundred twenty thousand, four hundred forty-eight".