1244340220 has 48 divisors (see below), whose sum is σ = 2661267168. Its totient is φ = 488597760.

The previous prime is 1244340199. The next prime is 1244340221. The reversal of 1244340220 is 220434421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1244340191 and 1244340200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244340221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1069359 + ... + 1070521.

It is an arithmetic number, because the mean of its divisors is an integer number (55443066).

Almost surely, 2^1244340220 is an apocalyptic number.

1244340220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244340220 is an abundant number, since it is smaller than the sum of its proper divisors (1416926948).

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

1244340220 is a wasteful number, since it uses less digits than its factorization.

1244340220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110 (or 2108 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1244340220 is about 35275.2068739504. The cubic root of 1244340220 is about 1075.5890681713.

Adding to 1244340220 its reverse (220434421), we get a palindrome (1464774641).

The spelling of 1244340220 in words is "one billion, two hundred forty-four million, three hundred forty thousand, two hundred twenty".