1680218432 has 56 divisors (see below), whose sum is σ = 3397727520. Its totient is φ = 824256000.

The previous prime is 1680218413. The next prime is 1680218473. The reversal of 1680218432 is 2348120861.

It is a junction number, because it is equal to n+sod(n) for n = 1680218392 and 1680218401.

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, 745307 + ... + 747557.

Almost surely, 2^1680218432 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 1680218432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1698863760).

1680218432 is an abundant number, since it is smaller than the sum of its proper divisors (1717509088).

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

1680218432 is a wasteful number, since it uses less digits than its factorization.

1680218432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 1680218432 is about 40990.4675747911. The cubic root of 1680218432 is about 1188.8359098580.

The spelling of 1680218432 in words is "one billion, six hundred eighty million, two hundred eighteen thousand, four hundred thirty-two".