1089840739 has 8 divisors (see below), whose sum is σ = 1174152672. Its totient is φ = 1005597120.

The previous prime is 1089840737. The next prime is 1089840757. The reversal of 1089840739 is 9370489801.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1089840739 - 2¹ = 1089840737 is a prime.

It is a super-2 number, since 2×1089840739² = 2375505672768132242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1089840692 and 1089840701.

It is not an unprimeable number, because it can be changed into a prime (1089840733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18879 + ... + 50359.

It is an arithmetic number, because the mean of its divisors is an integer number (146769084).

Almost surely, 2^1089840739 is an apocalyptic number.

1089840739 is a deficient number, since it is larger than the sum of its proper divisors (84311933).

1089840739 is a wasteful number, since it uses less digits than its factorization.

1089840739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34157.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 1089840739 is about 33012.7360120303. The cubic root of 1089840739 is about 1029.0923411153.

The spelling of 1089840739 in words is "one billion, eighty-nine million, eight hundred forty thousand, seven hundred thirty-nine".