855920385 has 32 divisors (see below), whose sum is σ = 1570728960. Its totient is φ = 441763200.

The previous prime is 855920383. The next prime is 855920411. The reversal of 855920385 is 583029558.

It is not a de Polignac number, because 855920385 - 2¹ = 855920383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 855920385.

It is not an unprimeable number, because it can be changed into a prime (855920383) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 98076 + ... + 106445.

It is an arithmetic number, because the mean of its divisors is an integer number (49085280).

Almost surely, 2^855920385 is an apocalyptic number.

It is an amenable number.

855920385 is a deficient number, since it is larger than the sum of its proper divisors (714808575).

855920385 is a wasteful number, since it uses less digits than its factorization.

855920385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204566 (or 204560 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The square root of 855920385 is about 29256.1170526781. The cubic root of 855920385 is about 949.4624419556.

The spelling of 855920385 in words is "eight hundred fifty-five million, nine hundred twenty thousand, three hundred eighty-five".