306403812 has 144 divisors (see below), whose sum is σ = 927920448. Its totient is φ = 84015360.

The previous prime is 306403807. The next prime is 306403843. The reversal of 306403812 is 218304603.

It is a happy number.

306403812 is a `hidden beast` number, since 3 + 0 + 640 + 3 + 8 + 12 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 272283 + ... + 273405.

It is an arithmetic number, because the mean of its divisors is an integer number (6443892).

Almost surely, 2^306403812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 306403812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (463960224).

306403812 is an abundant number, since it is smaller than the sum of its proper divisors (621516636).

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

306403812 is a wasteful number, since it uses less digits than its factorization.

306403812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210 (or 1205 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 306403812 is about 17504.3940769168. The cubic root of 306403812 is about 674.1627017273.

It can be divided in two parts, 3064038 and 12, that added together give a triangular number (3064050 = T₂₄₇₅).

The spelling of 306403812 in words is "three hundred six million, four hundred three thousand, eight hundred twelve".