306078380 has 12 divisors (see below), whose sum is σ = 642764640. Its totient is φ = 122431344.

The previous prime is 306078337. The next prime is 306078389. The reversal of 306078380 is 83870603.

It is a self number, because there is not a number n which added to its sum of digits gives 306078380.

It is not an unprimeable number, because it can be changed into a prime (306078389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7651940 + ... + 7651979.

It is an arithmetic number, because the mean of its divisors is an integer number (53563720).

Almost surely, 2^306078380 is an apocalyptic number.

It is an amenable number.

306078380 is an abundant number, since it is smaller than the sum of its proper divisors (336686260).

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

306078380 is a wasteful number, since it uses less digits than its factorization.

306078380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15303928 (or 15303926 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 306078380 is about 17495.0958842757. The cubic root of 306078380 is about 673.9239407344.

The spelling of 306078380 in words is "three hundred six million, seventy-eight thousand, three hundred eighty".