1244224140 has 48 divisors (see below), whose sum is σ = 3485368320. Its totient is φ = 331646400.

The previous prime is 1244224117. The next prime is 1244224147. The reversal of 1244224140 is 414224421.

It is a self number, because there is not a number n which added to its sum of digits gives 1244224140.

It is not an unprimeable number, because it can be changed into a prime (1244224147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240501 + ... + 245619.

It is an arithmetic number, because the mean of its divisors is an integer number (72611840).

Almost surely, 2^1244224140 is an apocalyptic number.

1244224140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244224140 is an abundant number, since it is smaller than the sum of its proper divisors (2241144180).

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

1244224140 is a wasteful number, since it uses less digits than its factorization.

1244224140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9182 (or 9180 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 1244224140 is about 35273.5614873236. The cubic root of 1244224140 is about 1075.5556211928. Note that the first 3 decimals are identical.

Adding to 1244224140 its reverse (414224421), we get a palindrome (1658448561).

The spelling of 1244224140 in words is "one billion, two hundred forty-four million, two hundred twenty-four thousand, one hundred forty".