1089867845 has 8 divisors (see below), whose sum is σ = 1426736160. Its totient is φ = 792631120.

The previous prime is 1089867827. The next prime is 1089867851. The reversal of 1089867845 is 5487689801.

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

It is not a de Polignac number, because 1089867845 - 2¹⁴ = 1089851461 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9907835 + ... + 9907944.

It is an arithmetic number, because the mean of its divisors is an integer number (178342020).

Almost surely, 2^1089867845 is an apocalyptic number.

It is an amenable number.

1089867845 is a deficient number, since it is larger than the sum of its proper divisors (336868315).

1089867845 is a wasteful number, since it uses less digits than its factorization.

1089867845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19815795.

The product of its (nonzero) digits is 3870720, while the sum is 56.

The square root of 1089867845 is about 33013.1465480042. The cubic root of 1089867845 is about 1029.1008727429.

The spelling of 1089867845 in words is "one billion, eighty-nine million, eight hundred sixty-seven thousand, eight hundred forty-five".