8420940646 has 8 divisors (see below), whose sum is σ = 12633270480. Its totient is φ = 4209850488.

The previous prime is 8420940643. The next prime is 8420940653. The reversal of 8420940646 is 6460490248.

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 (8420940643) 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, 292746 + ... + 320221.

It is an arithmetic number, because the mean of its divisors is an integer number (1579158810).

Almost surely, 2^8420940646 is an apocalyptic number.

8420940646 is a deficient number, since it is larger than the sum of its proper divisors (4212329834).

8420940646 is a wasteful number, since it uses less digits than its factorization.

8420940646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619838.

The product of its (nonzero) digits is 331776, while the sum is 43.

The square root of 8420940646 is about 91765.6833789189. The cubic root of 8420940646 is about 2034.4805179333.

The spelling of 8420940646 in words is "eight billion, four hundred twenty million, nine hundred forty thousand, six hundred forty-six".