855400847 has 8 divisors (see below), whose sum is σ = 986253216. Its totient is φ = 726711552.

The previous prime is 855400831. The next prime is 855400853. The reversal of 855400847 is 748004558.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 855400847 - 2⁴ = 855400831 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 (855400807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539918 + ... + 541499.

It is an arithmetic number, because the mean of its divisors is an integer number (123281652).

Almost surely, 2^855400847 is an apocalyptic number.

855400847 is a deficient number, since it is larger than the sum of its proper divisors (130852369).

855400847 is a wasteful number, since it uses less digits than its factorization.

855400847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081537.

The product of its (nonzero) digits is 179200, while the sum is 41.

The square root of 855400847 is about 29247.2365703155. The cubic root of 855400847 is about 949.2702972706.

The spelling of 855400847 in words is "eight hundred fifty-five million, four hundred thousand, eight hundred forty-seven".