421994306 has 8 divisors (see below), whose sum is σ = 633083904. Its totient is φ = 210966340.

The previous prime is 421994299. The next prime is 421994311. The reversal of 421994306 is 603499124.

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 421994306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10271 + ... + 30813.

It is an arithmetic number, because the mean of its divisors is an integer number (79135488).

Almost surely, 2^421994306 is an apocalyptic number.

It is a pronic number, being equal to 20542×20543.

421994306 is a deficient number, since it is larger than the sum of its proper divisors (211089598).

421994306 is a wasteful number, since it uses less digits than its factorization.

421994306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30816.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 421994306 is about 20542.4999939151. The cubic root of 421994306 is about 750.0706931883.

The spelling of 421994306 in words is "four hundred twenty-one million, nine hundred ninety-four thousand, three hundred six".