306806380 has 24 divisors (see below), whose sum is σ = 665078400. Its totient is φ = 118763520.

The previous prime is 306806369. The next prime is 306806389. The reversal of 306806380 is 83608603.

It is not an unprimeable number, because it can be changed into a prime (306806389) 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, 246805 + ... + 248044.

It is an arithmetic number, because the mean of its divisors is an integer number (27711600).

Almost surely, 2^306806380 is an apocalyptic number.

It is an amenable number.

306806380 is an abundant number, since it is smaller than the sum of its proper divisors (358272020).

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

306806380 is a wasteful number, since it uses less digits than its factorization.

306806380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494889 (or 494887 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 306806380 is about 17515.8893579515. The cubic root of 306806380 is about 674.4578215971.

The spelling of 306806380 in words is "three hundred six million, eight hundred six thousand, three hundred eighty".