306207420 has 144 divisors (see below), whose sum is σ = 922739328. Its totient is φ = 75841920.

The previous prime is 306207403. The next prime is 306207427. The reversal of 306207420 is 24702603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306207427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1451115 + ... + 1451325.

It is an arithmetic number, because the mean of its divisors is an integer number (6407912).

Almost surely, 2^306207420 is an apocalyptic number.

306207420 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 306207420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461369664).

306207420 is an abundant number, since it is smaller than the sum of its proper divisors (616531908).

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

306207420 is a wasteful number, since it uses less digits than its factorization.

306207420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 306207420 is about 17498.7833862815. The cubic root of 306207420 is about 674.0186342648.

The spelling of 306207420 in words is "three hundred six million, two hundred seven thousand, four hundred twenty".