1140344388 has 72 divisors (see below), whose sum is σ = 2932064408. Its totient is φ = 373621248.

The previous prime is 1140344371. The next prime is 1140344407. The reversal of 1140344388 is 8834430411.

It can be written as a sum of positive squares in 4 ways, for example, as 638673984 + 501670404 = 25272^2 + 22398^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1042770 + ... + 1043862.

Almost surely, 2^1140344388 is an apocalyptic number.

1140344388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1140344388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1466032204).

1140344388 is an abundant number, since it is smaller than the sum of its proper divisors (1791720020).

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

1140344388 is a wasteful number, since it uses less digits than its factorization.

1140344388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573 (or 1568 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 1140344388 is about 33768.9855932926. The cubic root of 1140344388 is about 1044.7491100420.

Adding to 1140344388 its reverse (8834430411), we get a palindrome (9974774799).

The spelling of 1140344388 in words is "one billion, one hundred forty million, three hundred forty-four thousand, three hundred eighty-eight".