306225780 has 96 divisors (see below), whose sum is σ = 984082176. Its totient is φ = 69697536.

The previous prime is 306225779. The next prime is 306225817. The reversal of 306225780 is 87522603.

306225780 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106522 + ... + 109358.

It is an arithmetic number, because the mean of its divisors is an integer number (10250856).

Almost surely, 2^306225780 is an apocalyptic number.

306225780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 306225780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (492041088).

306225780 is an abundant number, since it is smaller than the sum of its proper divisors (677856396).

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

306225780 is a wasteful number, since it uses less digits than its factorization.

306225780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3113 (or 3111 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 306225780 is about 17499.3079863176. The cubic root of 306225780 is about 674.0321052369.

The spelling of 306225780 in words is "three hundred six million, two hundred twenty-five thousand, seven hundred eighty".