243662020 has 96 divisors (see below), whose sum is σ = 636152832. Its totient is φ = 76474368.

The previous prime is 243661997. The next prime is 243662051. The reversal of 243662020 is 20266342.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86677 + ... + 89443.

It is an arithmetic number, because the mean of its divisors is an integer number (6626592).

Almost surely, 2^243662020 is an apocalyptic number.

243662020 is a gapful number since it is divisible by the number (20) 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 243662020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318076416).

243662020 is an abundant number, since it is smaller than the sum of its proper divisors (392490812).

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

243662020 is a wasteful number, since it uses less digits than its factorization.

243662020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837 (or 2835 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 243662020 is about 15609.6771267057. The cubic root of 243662020 is about 624.5913232315.

The spelling of 243662020 in words is "two hundred forty-three million, six hundred sixty-two thousand, twenty".