861420818 has 8 divisors (see below), whose sum is σ = 1292430720. Its totient is φ = 430610580.

The previous prime is 861420797. The next prime is 861420829. The reversal of 861420818 is 818024168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38618 + ... + 56693.

It is an arithmetic number, because the mean of its divisors is an integer number (161553840).

Almost surely, 2^861420818 is an apocalyptic number.

861420818 is a deficient number, since it is larger than the sum of its proper divisors (431009902).

861420818 is a wasteful number, since it uses less digits than its factorization.

861420818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99832.

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 861420818 is about 29349.9713458122. The cubic root of 861420818 is about 951.4919559635.

The spelling of 861420818 in words is "eight hundred sixty-one million, four hundred twenty thousand, eight hundred eighteen".