1206320220 has 216 divisors, whose sum is σ = 4282138224. Its totient is φ = 274079232.

The previous prime is 1206320197. The next prime is 1206320243. The reversal of 1206320220 is 220236021.

1206320220 is a `hidden beast` number, since 12 + 0 + 632 + 0 + 2 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (1206320197) and next prime (1206320243).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1206320193 and 1206320202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2054767 + ... + 2055353.

It is an arithmetic number, because the mean of its divisors is an integer number (19824714).

Almost surely, 2^1206320220 is an apocalyptic number.

1206320220 is a gapful number since it is divisible by the number (10) 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 1206320220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2141069112).

1206320220 is an abundant number, since it is smaller than the sum of its proper divisors (3075818004).

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

1206320220 is a wasteful number, since it uses less digits than its factorization.

1206320220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1206320220 is about 34732.1208681532. The cubic root of 1206320220 is about 1064.5209245123.

Adding to 1206320220 its reverse (220236021), we get a palindrome (1426556241).

The spelling of 1206320220 in words is "one billion, two hundred six million, three hundred twenty thousand, two hundred twenty".