1680725284 has 72 divisors (see below), whose sum is σ = 3502632672. Its totient is φ = 703422720.

The previous prime is 1680725279. The next prime is 1680725297. The reversal of 1680725284 is 4825270861.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1680725284.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1719804 + ... + 1720780.

It is an arithmetic number, because the mean of its divisors is an integer number (48647676).

Almost surely, 2^1680725284 is an apocalyptic number.

1680725284 is a gapful number since it is divisible by the number (14) 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 1680725284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1751316336).

1680725284 is an abundant number, since it is smaller than the sum of its proper divisors (1821907388).

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

1680725284 is a wasteful number, since it uses less digits than its factorization.

1680725284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193 (or 1184 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 1680725284 is about 40996.6496679912. The cubic root of 1680725284 is about 1188.9554386184.

The spelling of 1680725284 in words is "one billion, six hundred eighty million, seven hundred twenty-five thousand, two hundred eighty-four".