306845990 has 32 divisors (see below), whose sum is σ = 628736256. Its totient is φ = 106728160.

The previous prime is 306845977. The next prime is 306845999. The reversal of 306845990 is 99548603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306845999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58112 + ... + 63171.

It is an arithmetic number, because the mean of its divisors is an integer number (19648008).

Almost surely, 2^306845990 is an apocalyptic number.

306845990 is an abundant number, since it is smaller than the sum of its proper divisors (321890266).

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

306845990 is a wasteful number, since it uses less digits than its factorization.

306845990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121324.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 306845990 is about 17517.0200091226. The cubic root of 306845990 is about 674.4868454663.

The spelling of 306845990 in words is "three hundred six million, eight hundred forty-five thousand, nine hundred ninety".