1203323220 has 108 divisors (see below), whose sum is σ = 4012144500. Its totient is φ = 291709440.

The previous prime is 1203323171. The next prime is 1203323221. The reversal of 1203323220 is 223233021.

It is a happy number.

1203323220 is a `hidden beast` number, since 12 + 0 + 332 + 322 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 635644944 + 567678276 = 25212^2 + 23826^2 .

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 = 1203323193 and 1203323202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203323221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5845 + ... + 49404.

Almost surely, 2^1203323220 is an apocalyptic number.

1203323220 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 1203323220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2006072250).

1203323220 is an abundant number, since it is smaller than the sum of its proper divisors (2808821280).

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

1203323220 is a wasteful number, since it uses less digits than its factorization.

1203323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55286 (or 55270 counting only the distinct ones).

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

The square root of 1203323220 is about 34688.9495372806. The cubic root of 1203323220 is about 1063.6386228709.

Adding to 1203323220 its reverse (223233021), we get a palindrome (1426556241).

It can be divided in two parts, 12033 and 23220, that added together give a palindrome (35253).

The spelling of 1203323220 in words is "one billion, two hundred three million, three hundred twenty-three thousand, two hundred twenty".