861930441 has 6 divisors (see below), whose sum is σ = 1245010650. Its totient is φ = 574620288.

The previous prime is 861930401. The next prime is 861930463. The reversal of 861930441 is 144039168.

861930441 is a `hidden beast` number, since 8 + 619 + 30 + 4 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 553190400 + 308740041 = 23520^2 + 17571^2 .

It is not a de Polignac number, because 861930441 - 2¹⁰ = 861929417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 861930396 and 861930405.

It is not an unprimeable number, because it can be changed into a prime (861930401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47885016 + ... + 47885033.

It is an arithmetic number, because the mean of its divisors is an integer number (207501775).

Almost surely, 2^861930441 is an apocalyptic number.

It is an amenable number.

861930441 is a deficient number, since it is larger than the sum of its proper divisors (383080209).

861930441 is a wasteful number, since it uses less digits than its factorization.

861930441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95770055 (or 95770052 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 861930441 is about 29358.6518934368. The cubic root of 861930441 is about 951.6795555596.

It can be divided in two parts, 8619 and 30441, that added together give a triangular number (39060 = T₂₇₉).

The spelling of 861930441 in words is "eight hundred sixty-one million, nine hundred thirty thousand, four hundred forty-one".