3821680 has 80 divisors (see below), whose sum is σ = 9713664. Its totient is φ = 1393920.

The previous prime is 3821669. The next prime is 3821681. The reversal of 3821680 is 861283.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3821681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57007 + ... + 57073.

Almost surely, 2^3821680 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 3821680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4856832).

3821680 is an abundant number, since it is smaller than the sum of its proper divisors (5891984).

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

3821680 is a wasteful number, since it uses less digits than its factorization.

3821680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 3821680 is about 1954.9117627146. The cubic root of 3821680 is about 156.3452794878.

The spelling of 3821680 in words is "three million, eight hundred twenty-one thousand, six hundred eighty".