7818944 has 56 divisors (see below), whose sum is σ = 18336768. Its totient is φ = 3237120.

The previous prime is 7818907. The next prime is 7818949. The reversal of 7818944 is 4498187.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×7818944² = 122271770550272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7818949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13607 + ... + 14169.

Almost surely, 2^7818944 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 7818944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9168384).

7818944 is an abundant number, since it is smaller than the sum of its proper divisors (10517824).

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

7818944 is a wasteful number, since it uses less digits than its factorization.

7818944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 603 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 7818944 is about 2796.2374720327. The cubic root of 7818944 is about 198.4796723025.

The spelling of 7818944 in words is "seven million, eight hundred eighteen thousand, nine hundred forty-four".