1233320220 has 72 divisors (see below), whose sum is σ = 4081175280. Its totient is φ = 298986240.

The previous prime is 1233320219. The next prime is 1233320227. The reversal of 1233320220 is 220233321.

It is a happy number.

1233320220 is a `hidden beast` number, since 123 + 3 + 320 + 220 = 666.

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 = 1233320193 and 1233320202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233320227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 309465 + ... + 313424.

It is an arithmetic number, because the mean of its divisors is an integer number (56682990).

Almost surely, 2^1233320220 is an apocalyptic number.

1233320220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1233320220 is an abundant number, since it is smaller than the sum of its proper divisors (2847855060).

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

1233320220 is a wasteful number, since it uses less digits than its factorization.

1233320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622915 (or 622910 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 1233320220 is about 35118.6591429684. The cubic root of 1233320220 is about 1072.4044741887.

Adding to 1233320220 its reverse (220233321), we get a palindrome (1453553541).

The spelling of 1233320220 in words is "one billion, two hundred thirty-three million, three hundred twenty thousand, two hundred twenty".