861101320 has 32 divisors (see below), whose sum is σ = 1943092800. Its totient is φ = 343442368.

The previous prime is 861101309. The next prime is 861101327. The reversal of 861101320 is 23101168.

It is a junction number, because it is equal to n+sod(n) for n = 861101291 and 861101300.

It is not an unprimeable number, because it can be changed into a prime (861101327) 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, 17140 + ... + 44899.

It is an arithmetic number, because the mean of its divisors is an integer number (60721650).

Almost surely, 2^861101320 is an apocalyptic number.

It is an amenable number.

861101320 is an abundant number, since it is smaller than the sum of its proper divisors (1081991480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861101320 is a wasteful number, since it uses less digits than its factorization.

861101320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62397 (or 62393 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 861101320 is about 29344.5279396347. The cubic root of 861101320 is about 951.3743063926.

Adding to 861101320 its reverse (23101168), we get a palindrome (884202488).

The spelling of 861101320 in words is "eight hundred sixty-one million, one hundred one thousand, three hundred twenty".