861442210 has 16 divisors (see below), whose sum is σ = 1553924736. Its totient is φ = 343837168.

The previous prime is 861442193. The next prime is 861442213. The reversal of 861442210 is 12244168.

It is not an unprimeable number, because it can be changed into a prime (861442213) 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, 87562 + ... + 96901.

It is an arithmetic number, because the mean of its divisors is an integer number (97120296).

Almost surely, 2^861442210 is an apocalyptic number.

861442210 is a deficient number, since it is larger than the sum of its proper divisors (692482526).

861442210 is a wasteful number, since it uses less digits than its factorization.

861442210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184937.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 861442210 is about 29350.3357732071. The cubic root of 861442210 is about 951.4998321555.

Adding to 861442210 its reverse (12244168), we get a palindrome (873686378).

The spelling of 861442210 in words is "eight hundred sixty-one million, four hundred forty-two thousand, two hundred ten".