7998444 has 36 divisors (see below), whose sum is σ = 20715240. Its totient is φ = 2600640.

The previous prime is 7998443. The next prime is 7998451. The reversal of 7998444 is 4448997.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×7998444² = 127950212842272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7998444.

It is not an unprimeable number, because it can be changed into a prime (7998443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1234 + ... + 4185.

Almost surely, 2^7998444 is an apocalyptic number.

It is an amenable number.

7998444 is an abundant number, since it is smaller than the sum of its proper divisors (12716796).

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

7998444 is a wasteful number, since it uses less digits than its factorization.

7998444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470 (or 5465 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 7998444 is about 2828.1520468320. The cubic root of 7998444 is about 199.9870324926.

The spelling of 7998444 in words is "seven million, nine hundred ninety-eight thousand, four hundred forty-four".