7989408 has 96 divisors (see below), whose sum is σ = 26651520. Its totient is φ = 2280960.

The previous prime is 7989407. The next prime is 7989409. The reversal of 7989408 is 8049897.

It is an interprime number because it is at equal distance from previous prime (7989407) and next prime (7989409).

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (7989407) 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, 5388 + ... + 6708.

It is an arithmetic number, because the mean of its divisors is an integer number (277620).

Almost surely, 2^7989408 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 7989408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13325760).

7989408 is an abundant number, since it is smaller than the sum of its proper divisors (18662112).

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

7989408 is a wasteful number, since it uses less digits than its factorization.

7989408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347 (or 1333 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 7989408 is about 2826.5540858084. The cubic root of 7989408 is about 199.9116943496.

The spelling of 7989408 in words is "seven million, nine hundred eighty-nine thousand, four hundred eight".