7988840242 has 16 divisors (see below), whose sum is σ = 12279267000. Its totient is φ = 3895810560.

The previous prime is 7988840231. The next prime is 7988840257. The reversal of 7988840242 is 2420488897.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3631388121 + 4357452121 = 60261^2 + 66011^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7988840242.

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, 296134 + ... + 321982.

Almost surely, 2^7988840242 is an apocalyptic number.

7988840242 is a deficient number, since it is larger than the sum of its proper divisors (4290426758).

7988840242 is a wasteful number, since it uses less digits than its factorization.

7988840242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29661.

The product of its (nonzero) digits is 2064384, while the sum is 52.

The square root of 7988840242 is about 89380.3123847752. The cubic root of 7988840242 is about 1999.0695874000.

The spelling of 7988840242 in words is "seven billion, nine hundred eighty-eight million, eight hundred forty thousand, two hundred forty-two".