861022730 has 16 divisors (see below), whose sum is σ = 1558802664. Its totient is φ = 342417600.

The previous prime is 861022717. The next prime is 861022741. The reversal of 861022730 is 37220168.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 846053569 + 14969161 = 29087^2 + 3869^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 861022693 and 861022702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247121 + ... + 250580.

Almost surely, 2^861022730 is an apocalyptic number.

861022730 is a deficient number, since it is larger than the sum of its proper divisors (697779934).

861022730 is a wasteful number, since it uses less digits than its factorization.

861022730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497881.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 861022730 is about 29343.1888178500. The cubic root of 861022730 is about 951.3453625351.

Adding to 861022730 its reverse (37220168), we get a palindrome (898242898).

The spelling of 861022730 in words is "eight hundred sixty-one million, twenty-two thousand, seven hundred thirty".