307290228 has 96 divisors (see below), whose sum is σ = 851558400. Its totient is φ = 84395520.

The previous prime is 307290223. The next prime is 307290239. The reversal of 307290228 is 822092703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307290223) 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 31 ways as a sum of consecutive naturals, for example, 517900 + ... + 518492.

It is an arithmetic number, because the mean of its divisors is an integer number (8870400).

Almost surely, 2^307290228 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 307290228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (425779200).

307290228 is an abundant number, since it is smaller than the sum of its proper divisors (544268172).

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

307290228 is a wasteful number, since it uses less digits than its factorization.

307290228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 835 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 307290228 is about 17529.6956048872. The cubic root of 307290228 is about 674.8121858813.

The spelling of 307290228 in words is "three hundred seven million, two hundred ninety thousand, two hundred twenty-eight".