4001984 has 28 divisors (see below), whose sum is σ = 9076944. Its totient is φ = 1714944.

The previous prime is 4001947. The next prime is 4001999. The reversal of 4001984 is 4891004.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4019 + ... + 4914.

Almost surely, 2^4001984 is an apocalyptic number.

It is an amenable number.

4001984 is an abundant number, since it is smaller than the sum of its proper divisors (5074960).

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

4001984 is an equidigital number, since it uses as much as digits as its factorization.

4001984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8952 (or 8942 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 4001984 is about 2000.4959385112. The cubic root of 4001984 is about 158.7663458896.

Adding to 4001984 its reverse (4891004), we get a palindrome (8892988).

The spelling of 4001984 in words is "four million, one thousand, nine hundred eighty-four".