1140640009 has 16 divisors (see below), whose sum is σ = 1193066496. Its totient is φ = 1089277200.

The previous prime is 1140639991. The next prime is 1140640027. The reversal of 1140640009 is 9000460411.

It is an interprime number because it is at equal distance from previous prime (1140639991) and next prime (1140640027).

It is a cyclic number.

It is not a de Polignac number, because 1140640009 - 2⁷ = 1140639881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1140640079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1150504 + ... + 1151494.

It is an arithmetic number, because the mean of its divisors is an integer number (74566656).

Almost surely, 2^1140640009 is an apocalyptic number.

It is an amenable number.

1140640009 is a deficient number, since it is larger than the sum of its proper divisors (52426487).

1140640009 is a wasteful number, since it uses less digits than its factorization.

1140640009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1140640009 is about 33773.3624177398. The cubic root of 1140640009 is about 1044.8393819210.

It can be divided in two parts, 11406 and 40009, that added together give a palindrome (51415).

The spelling of 1140640009 in words is "one billion, one hundred forty million, six hundred forty thousand, nine".