284664220 has 12 divisors (see below), whose sum is σ = 597794904. Its totient is φ = 113865680.

The previous prime is 284664197. The next prime is 284664223. The reversal of 284664220 is 22466482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284664223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7116586 + ... + 7116625.

It is an arithmetic number, because the mean of its divisors is an integer number (49816242).

Almost surely, 2^284664220 is an apocalyptic number.

284664220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

284664220 is an abundant number, since it is smaller than the sum of its proper divisors (313130684).

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

284664220 is a wasteful number, since it uses less digits than its factorization.

284664220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14233220 (or 14233218 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 284664220 is about 16871.9951398760. The cubic root of 284664220 is about 657.8258886527.

The spelling of 284664220 in words is "two hundred eighty-four million, six hundred sixty-four thousand, two hundred twenty".