642840214 has 8 divisors (see below), whose sum is σ = 964371600. Its totient is φ = 321383016.

The previous prime is 642840203. The next prime is 642840217. The reversal of 642840214 is 412048246.

642840214 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642840217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15952 + ... + 39244.

It is an arithmetic number, because the mean of its divisors is an integer number (120546450).

Almost surely, 2^642840214 is an apocalyptic number.

642840214 is a deficient number, since it is larger than the sum of its proper divisors (321531386).

642840214 is a wasteful number, since it uses less digits than its factorization.

642840214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37094.

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 642840214 is about 25354.2937980927. The cubic root of 642840214 is about 863.0467981033.

The spelling of 642840214 in words is "six hundred forty-two million, eight hundred forty thousand, two hundred fourteen".