304263220 has 24 divisors (see below), whose sum is σ = 643835808. Its totient is φ = 120775200.

The previous prime is 304263217. The next prime is 304263221. The reversal of 304263220 is 22362403.

It is a happy number.

It is a super-2 number, since 2×304263220² = 185152214089536800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 304263191 and 304263200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304263221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55446 + ... + 60685.

It is an arithmetic number, because the mean of its divisors is an integer number (26826492).

Almost surely, 2^304263220 is an apocalyptic number.

It is an amenable number.

304263220 is an abundant number, since it is smaller than the sum of its proper divisors (339572588).

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

304263220 is a wasteful number, since it uses less digits than its factorization.

304263220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116271 (or 116269 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 304263220 is about 17443.1424921085. The cubic root of 304263220 is about 672.5890909825.

The spelling of 304263220 in words is "three hundred four million, two hundred sixty-three thousand, two hundred twenty".