861361472 has 28 divisors (see below), whose sum is σ = 1710209940. Its totient is φ = 430442496.

The previous prime is 861361471. The next prime is 861361481. The reversal of 861361472 is 274163168.

It can be written as a sum of positive squares in 2 ways, for example, as 839608576 + 21752896 = 28976^2 + 4664^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861361471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195518 + ... + 199874.

Almost surely, 2^861361472 is an apocalyptic number.

It is an amenable number.

861361472 is a deficient number, since it is larger than the sum of its proper divisors (848848468).

861361472 is a wasteful number, since it uses less digits than its factorization.

861361472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7458 (or 7448 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 861361472 is about 29348.9603223010. The cubic root of 861361472 is about 951.4701050333.

The spelling of 861361472 in words is "eight hundred sixty-one million, three hundred sixty-one thousand, four hundred seventy-two".