306820668 has 72 divisors (see below), whose sum is σ = 899360896. Its totient is φ = 79691040.

The previous prime is 306820663. The next prime is 306820669. The reversal of 306820668 is 866028603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306820663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4930 + ... + 25257.

Almost surely, 2^306820668 is an apocalyptic number.

It is an amenable number.

306820668 is an abundant number, since it is smaller than the sum of its proper divisors (592540228).

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

306820668 is a wasteful number, since it uses less digits than its factorization.

306820668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30223 (or 30210 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 306820668 is about 17516.2972114543. The cubic root of 306820668 is about 674.4682912879.

The spelling of 306820668 in words is "three hundred six million, eight hundred twenty thousand, six hundred sixty-eight".