861593332 has 12 divisors (see below), whose sum is σ = 1509505956. Its totient is φ = 430305920.

The previous prime is 861593329. The next prime is 861593339. The reversal of 861593332 is 233395168.

It can be written as a sum of positive squares in 2 ways, for example, as 549152356 + 312440976 = 23434^2 + 17676^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861593339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118723 + ... + 125770.

It is an arithmetic number, because the mean of its divisors is an integer number (125792163).

Almost surely, 2^861593332 is an apocalyptic number.

It is an amenable number.

861593332 is a deficient number, since it is larger than the sum of its proper divisors (647912624).

861593332 is a wasteful number, since it uses less digits than its factorization.

861593332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245378 (or 245376 counting only the distinct ones).

The product of its digits is 116640, while the sum is 40.

The square root of 861593332 is about 29352.9101112649. The cubic root of 861593332 is about 951.5554691437. Note that the first 3 decimals are identical.

The spelling of 861593332 in words is "eight hundred sixty-one million, five hundred ninety-three thousand, three hundred thirty-two".