861881362 has 16 divisors (see below), whose sum is σ = 1322803872. Its totient is φ = 421057440.

The previous prime is 861881359. The next prime is 861881387. The reversal of 861881362 is 263188168.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11964 + ... + 43207.

It is an arithmetic number, because the mean of its divisors is an integer number (82675242).

Almost surely, 2^861881362 is an apocalyptic number.

861881362 is a deficient number, since it is larger than the sum of its proper divisors (460922510).

861881362 is a wasteful number, since it uses less digits than its factorization.

861881362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55353.

The product of its digits is 110592, while the sum is 43.

The square root of 861881362 is about 29357.8160291259. The cubic root of 861881362 is about 951.6614920882.

The spelling of 861881362 in words is "eight hundred sixty-one million, eight hundred eighty-one thousand, three hundred sixty-two".