304055220 has 192 divisors, whose sum is σ = 1012064256. Its totient is φ = 66769920.

The previous prime is 304055209. The next prime is 304055231. The reversal of 304055220 is 22550403.

It is an interprime number because it is at equal distance from previous prime (304055209) and next prime (304055231).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1440915 + ... + 1441125.

It is an arithmetic number, because the mean of its divisors is an integer number (5271168).

Almost surely, 2^304055220 is an apocalyptic number.

304055220 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 304055220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (506032128).

304055220 is an abundant number, since it is smaller than the sum of its proper divisors (708009036).

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

304055220 is a wasteful number, since it uses less digits than its factorization.

304055220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 304055220 is about 17437.1792443617. The cubic root of 304055220 is about 672.4357912375.

The spelling of 304055220 in words is "three hundred four million, fifty-five thousand, two hundred twenty".