855020840 has 16 divisors (see below), whose sum is σ = 1923796980. Its totient is φ = 342008320.

The previous prime is 855020821. The next prime is 855020863. The reversal of 855020840 is 48020558.

855020840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 719205124 + 135815716 = 26818^2 + 11654^2 .

It is a junction number, because it is equal to n+sod(n) for n = 855020797 and 855020806.

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, 10687721 + ... + 10687800.

Almost surely, 2^855020840 is an apocalyptic number.

It is an amenable number.

855020840 is an abundant number, since it is smaller than the sum of its proper divisors (1068776140).

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

855020840 is a wasteful number, since it uses less digits than its factorization.

855020840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21375532 (or 21375528 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 855020840 is about 29240.7393887364. The cubic root of 855020840 is about 949.1297071252.

The spelling of 855020840 in words is "eight hundred fifty-five million, twenty thousand, eight hundred forty".