4004992 has 32 divisors (see below), whose sum is σ = 8115120. Its totient is φ = 1968384.

The previous prime is 4004989. The next prime is 4005019. The reversal of 4004992 is 2994004.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 4004992.

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, 8343 + ... + 8809.

Almost surely, 2^4004992 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 4004992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4057560).

4004992 is an abundant number, since it is smaller than the sum of its proper divisors (4110128).

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

4004992 is an equidigital number, since it uses as much as digits as its factorization.

4004992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 4004992 is about 2001.2476108668. The cubic root of 4004992 is about 158.8061136287.

Adding to 4004992 its reverse (2994004), we get a palindrome (6998996).

The spelling of 4004992 in words is "four million, four thousand, nine hundred ninety-two".