861109704 has 320 divisors, whose sum is σ = 3146774400. Its totient is φ = 213497856.

The previous prime is 861109703. The next prime is 861109727. The reversal of 861109704 is 407901168.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861109703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1002027 + ... + 1002885.

It is an arithmetic number, because the mean of its divisors is an integer number (9833670).

Almost surely, 2^861109704 is an apocalyptic number.

861109704 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861109704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1573387200).

861109704 is an abundant number, since it is smaller than the sum of its proper divisors (2285664696).

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

861109704 is a wasteful number, since it uses less digits than its factorization.

861109704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 861109704 is about 29344.6707938597. The cubic root of 861109704 is about 951.3773940262.

The spelling of 861109704 in words is "eight hundred sixty-one million, one hundred nine thousand, seven hundred four".