306421818 has 8 divisors (see below), whose sum is σ = 612843648. Its totient is φ = 102140604.

The previous prime is 306421813. The next prime is 306421867. The reversal of 306421818 is 818124603.

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

306421818 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (306421813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25535146 + ... + 25535157.

It is an arithmetic number, because the mean of its divisors is an integer number (76605456).

Almost surely, 2^306421818 is an apocalyptic number.

306421818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

306421818 is a wasteful number, since it uses less digits than its factorization.

306421818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51070308.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 306421818 is about 17504.9083973610. The cubic root of 306421818 is about 674.1759073243.

The spelling of 306421818 in words is "three hundred six million, four hundred twenty-one thousand, eight hundred eighteen".