306745230 has 64 divisors (see below), whose sum is σ = 821829888. Its totient is φ = 72629760.

The previous prime is 306745223. The next prime is 306745247. The reversal of 306745230 is 32547603.

It is a super-2 number, since 2×306745230² = 188185272255505800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 3382 + ... + 24998.

It is an arithmetic number, because the mean of its divisors is an integer number (12841092).

Almost surely, 2^306745230 is an apocalyptic number.

306745230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 306745230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410914944).

306745230 is an abundant number, since it is smaller than the sum of its proper divisors (515084658).

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

306745230 is a wasteful number, since it uses less digits than its factorization.

306745230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21681.

The product of its (nonzero) digits is 15120, while the sum is 30.

The square root of 306745230 is about 17514.1437130109. The cubic root of 306745230 is about 674.4130095823.

The spelling of 306745230 in words is "three hundred six million, seven hundred forty-five thousand, two hundred thirty".