1244040231 has 32 divisors (see below), whose sum is σ = 1987983360. Its totient is φ = 676940544.

The previous prime is 1244040209. The next prime is 1244040247. The reversal of 1244040231 is 1320404421.

It is not a de Polignac number, because 1244040231 - 2⁷ = 1244040103 is a prime.

It is a super-2 number, since 2×1244040231² = 3095272192693066722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1244040198 and 1244040207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244040251) 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 31 ways as a sum of consecutive naturals, for example, 30466 + ... + 58448.

It is an arithmetic number, because the mean of its divisors is an integer number (62124480).

Almost surely, 2^1244040231 is an apocalyptic number.

1244040231 is a deficient number, since it is larger than the sum of its proper divisors (743943129).

1244040231 is a wasteful number, since it uses less digits than its factorization.

1244040231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28095.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1244040231 is about 35270.9544951650. The cubic root of 1244040231 is about 1075.5026258900.

Adding to 1244040231 its reverse (1320404421), we get a palindrome (2564444652).

The spelling of 1244040231 in words is "one billion, two hundred forty-four million, forty thousand, two hundred thirty-one".