7899444 has 108 divisors (see below), whose sum is σ = 24248224. Its totient is φ = 2204496.

The previous prime is 7899443. The next prime is 7899457. The reversal of 7899444 is 4449987.

It is a tau number, because it is divible by the number of its divisors (108).

It is a self number, because there is not a number n which added to its sum of digits gives 7899444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7899443) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 183687 + ... + 183729.

Almost surely, 2^7899444 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 7899444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12124112).

7899444 is an abundant number, since it is smaller than the sum of its proper divisors (16348780).

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

7899444 is an equidigital number, since it uses as much as digits as its factorization.

7899444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 55 counting only the distinct ones).

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

The square root of 7899444 is about 2810.5949548094. The cubic root of 7899444 is about 199.1584976682.

The spelling of 7899444 in words is "seven million, eight hundred ninety-nine thousand, four hundred forty-four".