7909944 has 64 divisors (see below), whose sum is σ = 22809600. Its totient is φ = 2239104.

The previous prime is 7909943. The next prime is 7909949. The reversal of 7909944 is 4499097.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 7909896 and 7909905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7909943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32977 + ... + 33215.

It is an arithmetic number, because the mean of its divisors is an integer number (356400).

Almost surely, 2^7909944 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 7909944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11404800).

7909944 is an abundant number, since it is smaller than the sum of its proper divisors (14899656).

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

7909944 is a wasteful number, since it uses less digits than its factorization.

7909944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 7909944 is about 2812.4622664135. The cubic root of 7909944 is about 199.2466995880.

The spelling of 7909944 in words is "seven million, nine hundred nine thousand, nine hundred forty-four".