1244004140 has 12 divisors (see below), whose sum is σ = 2612408736. Its totient is φ = 497601648.

The previous prime is 1244004133. The next prime is 1244004143. The reversal of 1244004140 is 414004421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 62200207 = 1244004140 / (1 + 2 + 4 + 4 + 0 + 0 + 4 + 1 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (1244004143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31100084 + ... + 31100123.

It is an arithmetic number, because the mean of its divisors is an integer number (217700728).

Almost surely, 2^1244004140 is an apocalyptic number.

1244004140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244004140 is an abundant number, since it is smaller than the sum of its proper divisors (1368404596).

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

1244004140 is a wasteful number, since it uses less digits than its factorization.

1244004140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62200216 (or 62200214 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1244004140 is about 35270.4428665136. The cubic root of 1244004140 is about 1075.4922252776.

Adding to 1244004140 its reverse (414004421), we get a palindrome (1658008561).

The spelling of 1244004140 in words is "one billion, two hundred forty-four million, four thousand, one hundred forty".