7981568 has 80 divisors (see below), whose sum is σ = 19445184. Its totient is φ = 3194880.

The previous prime is 7981553. The next prime is 7981591. The reversal of 7981568 is 8651897.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60863 + ... + 60993.

Almost surely, 2^7981568 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 7981568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9722592).

7981568 is an abundant number, since it is smaller than the sum of its proper divisors (11463616).

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

7981568 is a wasteful number, since it uses less digits than its factorization.

7981568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 157 counting only the distinct ones).

The product of its digits is 120960, while the sum is 44.

The square root of 7981568 is about 2825.1668977248. The cubic root of 7981568 is about 199.8462818840.

The spelling of 7981568 in words is "seven million, nine hundred eighty-one thousand, five hundred sixty-eight".