861384854 has 16 divisors (see below), whose sum is σ = 1458144720. Its totient is φ = 378036960.

The previous prime is 861384847. The next prime is 861384859. The reversal of 861384854 is 458483168.

It is a junction number, because it is equal to n+sod(n) for n = 861384799 and 861384808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861384859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674429 + ... + 675704.

It is an arithmetic number, because the mean of its divisors is an integer number (91134045).

Almost surely, 2^861384854 is an apocalyptic number.

861384854 is a deficient number, since it is larger than the sum of its proper divisors (596759866).

861384854 is a wasteful number, since it uses less digits than its factorization.

861384854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350175.

The product of its digits is 737280, while the sum is 47.

The square root of 861384854 is about 29349.3586642025. The cubic root of 861384854 is about 951.4787143003.

The spelling of 861384854 in words is "eight hundred sixty-one million, three hundred eighty-four thousand, eight hundred fifty-four".