7842838 has 8 divisors (see below), whose sum is σ = 11885832. Its totient is φ = 3880896.

The previous prime is 7842833. The next prime is 7842851. The reversal of 7842838 is 8382487.

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

It is a self number, because there is not a number n which added to its sum of digits gives 7842838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7842833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20020 + ... + 20407.

It is an arithmetic number, because the mean of its divisors is an integer number (1485729).

Almost surely, 2^7842838 is an apocalyptic number.

7842838 is a deficient number, since it is larger than the sum of its proper divisors (4042994).

7842838 is a wasteful number, since it uses less digits than its factorization.

7842838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40526.

The product of its digits is 86016, while the sum is 40.

The square root of 7842838 is about 2800.5067398598. The cubic root of 7842838 is about 198.6816454681.

The spelling of 7842838 in words is "seven million, eight hundred forty-two thousand, eight hundred thirty-eight".