1140844989 has 4 divisors (see below), whose sum is σ = 1521126656. Its totient is φ = 760563324.

The previous prime is 1140844973. The next prime is 1140845003. The reversal of 1140844989 is 9894480411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1140844989 - 2⁴ = 1140844973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140844589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190140829 + ... + 190140834.

It is an arithmetic number, because the mean of its divisors is an integer number (380281664).

Almost surely, 2^1140844989 is an apocalyptic number.

It is an amenable number.

1140844989 is a deficient number, since it is larger than the sum of its proper divisors (380281667).

1140844989 is an equidigital number, since it uses as much as digits as its factorization.

1140844989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380281666.

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 1140844989 is about 33776.3969215190. The cubic root of 1140844989 is about 1044.9019661856.

The spelling of 1140844989 in words is "one billion, one hundred forty million, eight hundred forty-four thousand, nine hundred eighty-nine".