1140440436 has 36 divisors (see below), whose sum is σ = 2885082564. Its totient is φ = 379843200.

The previous prime is 1140440429. The next prime is 1140440437. The reversal of 1140440436 is 6340440411.

It can be written as a sum of positive squares in 2 ways, for example, as 419840100 + 720600336 = 20490^2 + 26844^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140440437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35566 + ... + 59546.

Almost surely, 2^1140440436 is an apocalyptic number.

It is an amenable number.

1140440436 is an abundant number, since it is smaller than the sum of its proper divisors (1744642128).

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

1140440436 is a wasteful number, since it uses less digits than its factorization.

1140440436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25312 (or 25307 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1140440436 is about 33770.4076966802. The cubic root of 1140440436 is about 1044.7784413114.

Adding to 1140440436 its reverse (6340440411), we get a palindrome (7480880847).

The spelling of 1140440436 in words is "one billion, one hundred forty million, four hundred forty thousand, four hundred thirty-six".