861178442 has 8 divisors (see below), whose sum is σ = 1291908576. Its totient is φ = 430542252.

The previous prime is 861178433. The next prime is 861178453. The reversal of 861178442 is 244871168.

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

It is a self number, because there is not a number n which added to its sum of digits gives 861178442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7733 + ... + 42215.

It is an arithmetic number, because the mean of its divisors is an integer number (161488572).

Almost surely, 2^861178442 is an apocalyptic number.

861178442 is a deficient number, since it is larger than the sum of its proper divisors (430730134).

861178442 is a wasteful number, since it uses less digits than its factorization.

861178442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46972.

The product of its digits is 86016, while the sum is 41.

The square root of 861178442 is about 29345.8419882613. The cubic root of 861178442 is about 951.4027078893.

The spelling of 861178442 in words is "eight hundred sixty-one million, one hundred seventy-eight thousand, four hundred forty-two".