1140438549 has 16 divisors (see below), whose sum is σ = 1546630400. Its totient is φ = 747354816.

The previous prime is 1140438547. The next prime is 1140438569. The reversal of 1140438549 is 9458340411.

It is not a de Polignac number, because 1140438549 - 2¹ = 1140438547 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140438547) 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 15 ways as a sum of consecutive naturals, for example, 43767 + ... + 64779.

It is an arithmetic number, because the mean of its divisors is an integer number (96664400).

Almost surely, 2^1140438549 is an apocalyptic number.

It is an amenable number.

1140438549 is a deficient number, since it is larger than the sum of its proper divisors (406191851).

1140438549 is a wasteful number, since it uses less digits than its factorization.

1140438549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21324.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 1140438549 is about 33770.3797580069. The cubic root of 1140438549 is about 1044.7778650726. Note that the first 3 decimals are identical.

The spelling of 1140438549 in words is "one billion, one hundred forty million, four hundred thirty-eight thousand, five hundred forty-nine".