4001982 has 16 divisors (see below), whose sum is σ = 8106240. Its totient is φ = 1316952.

The previous prime is 4001947. The next prime is 4001999. The reversal of 4001982 is 2891004.

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, 3748 + ... + 4695.

It is an arithmetic number, because the mean of its divisors is an integer number (506640).

Almost surely, 2^4001982 is an apocalyptic number.

4001982 is an abundant number, since it is smaller than the sum of its proper divisors (4104258).

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

4001982 is a wasteful number, since it uses less digits than its factorization.

4001982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8527.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 4001982 is about 2000.4954386351. The cubic root of 4001982 is about 158.7663194416.

Adding to 4001982 its reverse (2891004), we get a palindrome (6892986).

The spelling of 4001982 in words is "four million, one thousand, nine hundred eighty-two".