7981908 has 48 divisors (see below), whose sum is σ = 21518784. Its totient is φ = 2275840.

The previous prime is 7981907. The next prime is 7981927. The reversal of 7981908 is 8091897.

It is a self number, because there is not a number n which added to its sum of digits gives 7981908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7981907) 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 15 ways as a sum of consecutive naturals, for example, 466 + ... + 4022.

It is an arithmetic number, because the mean of its divisors is an integer number (448308).

Almost surely, 2^7981908 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 7981908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10759392).

7981908 is an abundant number, since it is smaller than the sum of its proper divisors (13536876).

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

7981908 is a wasteful number, since it uses less digits than its factorization.

7981908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3592 (or 3590 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 7981908 is about 2825.2270705202. The cubic root of 7981908 is about 199.8491195374.

The spelling of 7981908 in words is "seven million, nine hundred eighty-one thousand, nine hundred eight".