861195204 has 18 divisors (see below), whose sum is σ = 2176910190. Its totient is φ = 287065056.

The previous prime is 861195199. The next prime is 861195229. The reversal of 861195204 is 402591168.

861195204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 858372804 + 2822400 = 29298^2 + 1680^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 23922089 = 861195204 / (8 + 6 + 1 + 1 + 9 + 5 + 2 + 0 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11961009 + ... + 11961080.

It is an arithmetic number, because the mean of its divisors is an integer number (120939455).

Almost surely, 2^861195204 is an apocalyptic number.

It is an amenable number.

861195204 is an abundant number, since it is smaller than the sum of its proper divisors (1315714986).

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

861195204 is a wasteful number, since it uses less digits than its factorization.

861195204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23922099 (or 23922094 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 861195204 is about 29346.1275809944. The cubic root of 861195204 is about 951.4088805584.

The spelling of 861195204 in words is "eight hundred sixty-one million, one hundred ninety-five thousand, two hundred four".