224244820 has 24 divisors (see below), whose sum is σ = 487153800. Its totient is φ = 86604672.

The previous prime is 224244799. The next prime is 224244847. The reversal of 224244820 is 28442422.

It can be written as a sum of positive squares in 4 ways, for example, as 6210064 + 218034756 = 2492^2 + 14766^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192735 + ... + 193894.

It is an arithmetic number, because the mean of its divisors is an integer number (20298075).

Almost surely, 2^224244820 is an apocalyptic number.

224244820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

224244820 is an abundant number, since it is smaller than the sum of its proper divisors (262908980).

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

224244820 is a wasteful number, since it uses less digits than its factorization.

224244820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386667 (or 386665 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

The square root of 224244820 is about 14974.8061757073. The cubic root of 224244820 is about 607.5389690888.

The spelling of 224244820 in words is "two hundred twenty-four million, two hundred forty-four thousand, eight hundred twenty".