8019842 has 4 divisors (see below), whose sum is σ = 12029766. Its totient is φ = 4009920.

The previous prime is 8019839. The next prime is 8019871. The reversal of 8019842 is 2489108.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5058001 + 2961841 = 2249^2 + 1721^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8019799 and 8019808.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2004959 + ... + 2004962.

Almost surely, 2^8019842 is an apocalyptic number.

8019842 is a deficient number, since it is larger than the sum of its proper divisors (4009924).

8019842 is a wasteful number, since it uses less digits than its factorization.

8019842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009923.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 8019842 is about 2831.9325556941. The cubic root of 8019842 is about 200.1652134849.

The spelling of 8019842 in words is "eight million, nineteen thousand, eight hundred forty-two".