306406220 has 24 divisors (see below), whose sum is σ = 643804224. Its totient is φ = 122495616.

The previous prime is 306406183. The next prime is 306406223. The reversal of 306406220 is 22604603.

It is not an unprimeable number, because it can be changed into a prime (306406223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51437 + ... + 57083.

It is an arithmetic number, because the mean of its divisors is an integer number (26825176).

Almost surely, 2^306406220 is an apocalyptic number.

It is an amenable number.

306406220 is an abundant number, since it is smaller than the sum of its proper divisors (337398004).

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

306406220 is a wasteful number, since it uses less digits than its factorization.

306406220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8369 (or 8367 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 306406220 is about 17504.4628595110. The cubic root of 306406220 is about 674.1644677840.

The spelling of 306406220 in words is "three hundred six million, four hundred six thousand, two hundred twenty".