855485389 has 16 divisors (see below), whose sum is σ = 948721536. Its totient is φ = 764928000.

The previous prime is 855485381. The next prime is 855485401. The reversal of 855485389 is 983584558.

It is a cyclic number.

It is not a de Polignac number, because 855485389 - 2³ = 855485381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855485381) 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, 175789 + ... + 180589.

It is an arithmetic number, because the mean of its divisors is an integer number (59295096).

Almost surely, 2^855485389 is an apocalyptic number.

It is an amenable number.

855485389 is a deficient number, since it is larger than the sum of its proper divisors (93236147).

855485389 is a wasteful number, since it uses less digits than its factorization.

855485389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5076.

The product of its digits is 6912000, while the sum is 55.

The square root of 855485389 is about 29248.6818335459. The cubic root of 855485389 is about 949.3015693797.

The spelling of 855485389 in words is "eight hundred fifty-five million, four hundred eighty-five thousand, three hundred eighty-nine".