855474447 has 16 divisors (see below), whose sum is σ = 1178258400. Its totient is φ = 551682432.

The previous prime is 855474377. The next prime is 855474457. The reversal of 855474447 is 744474558.

It is a de Polignac number, because none of the positive numbers 2^k-855474447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 855474396 and 855474405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855474457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3072 + ... + 41477.

It is an arithmetic number, because the mean of its divisors is an integer number (73641150).

Almost surely, 2^855474447 is an apocalyptic number.

855474447 is a deficient number, since it is larger than the sum of its proper divisors (322783953).

855474447 is a wasteful number, since it uses less digits than its factorization.

855474447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44762.

The product of its digits is 2508800, while the sum is 48.

The square root of 855474447 is about 29248.4947817832. The cubic root of 855474447 is about 949.2975220470.

The spelling of 855474447 in words is "eight hundred fifty-five million, four hundred seventy-four thousand, four hundred forty-seven".