1200313220 has 96 divisors (see below), whose sum is σ = 2850059520. Its totient is φ = 421908480.

The previous prime is 1200313193. The next prime is 1200313321. The reversal of 1200313220 is 223130021.

It is a happy number.

It is a super-2 number, since 2×1200313220² = 2881503652213536800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1200313195 and 1200313204.

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, 457352 + ... + 459968.

It is an arithmetic number, because the mean of its divisors is an integer number (29688120).

Almost surely, 2^1200313220 is an apocalyptic number.

1200313220 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 1200313220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1425029760).

1200313220 is an abundant number, since it is smaller than the sum of its proper divisors (1649746300).

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

1200313220 is a wasteful number, since it uses less digits than its factorization.

1200313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733 (or 2731 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1200313220 is about 34645.5367976887. The cubic root of 1200313220 is about 1062.7510183387.

Adding to 1200313220 its reverse (223130021), we get a palindrome (1423443241).

The spelling of 1200313220 in words is "one billion, two hundred million, three hundred thirteen thousand, two hundred twenty".