855399188 has 12 divisors (see below), whose sum is σ = 1710798432. Its totient is φ = 366599640.

The previous prime is 855399101. The next prime is 855399197. The reversal of 855399188 is 881993558.

855399188 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15274958 + ... + 15275013.

It is an arithmetic number, because the mean of its divisors is an integer number (142566536).

Almost surely, 2^855399188 is an apocalyptic number.

It is an amenable number.

855399188 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

855399188 is a wasteful number, since it uses less digits than its factorization.

855399188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30549982 (or 30549980 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 56.

The square root of 855399188 is about 29247.2082086479. The cubic root of 855399188 is about 949.2696835855.

The spelling of 855399188 in words is "eight hundred fifty-five million, three hundred ninety-nine thousand, one hundred eighty-eight".