7988481 has 12 divisors (see below), whose sum is σ = 11820900. Its totient is φ = 5195520.

The previous prime is 7988479. The next prime is 7988503. The reversal of 7988481 is 1848897.

It can be written as a sum of positive squares in 2 ways, for example, as 1440000 + 6548481 = 1200^2 + 2559^2 .

It is not a de Polignac number, because 7988481 - 2¹ = 7988479 is a prime.

It is a super-2 number, since 2×7988481² = 127631657374722, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7988441) 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 11 ways as a sum of consecutive naturals, for example, 10456 + ... + 11193.

It is an arithmetic number, because the mean of its divisors is an integer number (985075).

Almost surely, 2^7988481 is an apocalyptic number.

It is an amenable number.

7988481 is a deficient number, since it is larger than the sum of its proper divisors (3832419).

7988481 is a wasteful number, since it uses less digits than its factorization.

7988481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21696 (or 21693 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 7988481 is about 2826.3901004638. The cubic root of 7988481 is about 199.9039622244.

The spelling of 7988481 in words is "seven million, nine hundred eighty-eight thousand, four hundred eighty-one".