855654820 has 12 divisors (see below), whose sum is σ = 1796875164. Its totient is φ = 342261920.

The previous prime is 855654799. The next prime is 855654847. The reversal of 855654820 is 28456558.

It can be written as a sum of positive squares in 2 ways, for example, as 361304064 + 494350756 = 19008^2 + 22234^2 .

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, 21391351 + ... + 21391390.

It is an arithmetic number, because the mean of its divisors is an integer number (149739597).

Almost surely, 2^855654820 is an apocalyptic number.

It is an amenable number.

855654820 is an abundant number, since it is smaller than the sum of its proper divisors (941220344).

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

855654820 is a wasteful number, since it uses less digits than its factorization.

855654820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42782750 (or 42782748 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 43.

The square root of 855654820 is about 29251.5780770884. The cubic root of 855654820 is about 949.3642357517.

The spelling of 855654820 in words is "eight hundred fifty-five million, six hundred fifty-four thousand, eight hundred twenty".