7981131424 has 48 divisors (see below), whose sum is σ = 18072004608. Its totient is φ = 3398683392.

The previous prime is 7981131407. The next prime is 7981131437. The reversal of 7981131424 is 4241311897.

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, 78304 + ... + 148639.

It is an arithmetic number, because the mean of its divisors is an integer number (376500096).

Almost surely, 2^7981131424 is an apocalyptic number.

It is an amenable number.

7981131424 is an abundant number, since it is smaller than the sum of its proper divisors (10090873184).

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

7981131424 is a wasteful number, since it uses less digits than its factorization.

7981131424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227117 (or 227109 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 7981131424 is about 89337.1782854149. The cubic root of 7981131424 is about 1998.4263808528.

The spelling of 7981131424 in words is "seven billion, nine hundred eighty-one million, one hundred thirty-one thousand, four hundred twenty-four".