3721984 has 72 divisors (see below), whose sum is σ = 8895488. Its totient is φ = 1520640.

The previous prime is 3721981. The next prime is 3722009. The reversal of 3721984 is 4891273.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55519 + ... + 55585.

Almost surely, 2^3721984 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 3721984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4447744).

3721984 is an abundant number, since it is smaller than the sum of its proper divisors (5173504).

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

3721984 is an equidigital number, since it uses as much as digits as its factorization.

3721984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 107 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 3721984 is about 1929.2444116804. The cubic root of 3721984 is about 154.9737589986.

The spelling of 3721984 in words is "three million, seven hundred twenty-one thousand, nine hundred eighty-four".