7843220042 has 16 divisors (see below), whose sum is σ = 13469163840. Its totient is φ = 3355469088.

The previous prime is 7843219991. The next prime is 7843220057. The reversal of 7843220042 is 2400223487.

It is a super-2 number, since 2×7843220042² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7843219990 and 7843220008.

It is an unprimeable number.

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, 484328 + ... + 500259.

It is an arithmetic number, because the mean of its divisors is an integer number (841822740).

Almost surely, 2^7843220042 is an apocalyptic number.

7843220042 is a deficient number, since it is larger than the sum of its proper divisors (5625943798).

7843220042 is a wasteful number, since it uses less digits than its factorization.

7843220042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985165.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 7843220042 is about 88561.9559517517. The cubic root of 7843220042 is about 1986.8487148999.

The spelling of 7843220042 in words is "seven billion, eight hundred forty-three million, two hundred twenty thousand, forty-two".