1244043400 has 24 divisors (see below), whose sum is σ = 2892401370. Its totient is φ = 497617280.

The previous prime is 1244043397. The next prime is 1244043403. The reversal of 1244043400 is 43404421.

It is an interprime number because it is at equal distance from previous prime (1244043397) and next prime (1244043403).

It can be written as a sum of positive squares in 3 ways, for example, as 1061847396 + 182196004 = 32586^2 + 13498^2 .

It is not an unprimeable number, because it can be changed into a prime (1244043403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3109909 + ... + 3110308.

Almost surely, 2^1244043400 is an apocalyptic number.

1244043400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244043400 is an abundant number, since it is smaller than the sum of its proper divisors (1648357970).

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

1244043400 is a wasteful number, since it uses less digits than its factorization.

1244043400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6220233 (or 6220224 counting only the distinct ones).

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

The square root of 1244043400 is about 35270.9994187860. Note that the first 3 decimals coincide. The cubic root of 1244043400 is about 1075.5035391147.

Adding to 1244043400 its reverse (43404421), we get a palindrome (1287447821).

The spelling of 1244043400 in words is "one billion, two hundred forty-four million, forty-three thousand, four hundred".