7988840247 has 8 divisors (see below), whose sum is σ = 10654655344. Its totient is φ = 5324459328.

The previous prime is 7988840231. The next prime is 7988840257. The reversal of 7988840247 is 7420488897.

7988840247 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7988840247 - 2⁴ = 7988840231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7988840257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345478 + ... + 367875.

It is an arithmetic number, because the mean of its divisors is an integer number (1331831918).

Almost surely, 2^7988840247 is an apocalyptic number.

7988840247 is a deficient number, since it is larger than the sum of its proper divisors (2665815097).

7988840247 is a wasteful number, since it uses less digits than its factorization.

7988840247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717089.

The product of its (nonzero) digits is 7225344, while the sum is 57.

The square root of 7988840247 is about 89380.3124127456. The cubic root of 7988840247 is about 1999.0695878170.

The spelling of 7988840247 in words is "seven billion, nine hundred eighty-eight million, eight hundred forty thousand, two hundred forty-seven".