306390028 has 12 divisors (see below), whose sum is σ = 612780112. Its totient is φ = 131310000.

The previous prime is 306390011. The next prime is 306390037. The reversal of 306390028 is 820093603.

It is a happy number.

306390028 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5471223 + ... + 5471278.

Almost surely, 2^306390028 is an apocalyptic number.

It is an amenable number.

306390028 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.

306390028 is a wasteful number, since it uses less digits than its factorization.

306390028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10942512 (or 10942510 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 306390028 is about 17504.0003427788. Note that the first 3 decimals coincide. The cubic root of 306390028 is about 674.1525921946.

The spelling of 306390028 in words is "three hundred six million, three hundred ninety thousand, twenty-eight".