842643994 has 16 divisors (see below), whose sum is σ = 1298916000. Its totient is φ = 409685904.

The previous prime is 842643961. The next prime is 842644009. The reversal of 842643994 is 499346248.

842643994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 197617 + ... + 201835.

It is an arithmetic number, because the mean of its divisors is an integer number (81182250).

Almost surely, 2^842643994 is an apocalyptic number.

842643994 is a deficient number, since it is larger than the sum of its proper divisors (456272006).

842643994 is a wasteful number, since it uses less digits than its factorization.

842643994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6957.

The product of its digits is 1492992, while the sum is 49.

The square root of 842643994 is about 29028.3308855332. The cubic root of 842643994 is about 944.5277238500.

The spelling of 842643994 in words is "eight hundred forty-two million, six hundred forty-three thousand, nine hundred ninety-four".