861736378 has 16 divisors (see below), whose sum is σ = 1309978656. Its totient is φ = 425091280.

The previous prime is 861736373. The next prime is 861736417. The reversal of 861736378 is 873637168.

It is not an unprimeable number, because it can be changed into a prime (861736373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133125 + ... + 139447.

It is an arithmetic number, because the mean of its divisors is an integer number (81873666).

Almost surely, 2^861736378 is an apocalyptic number.

861736378 is a deficient number, since it is larger than the sum of its proper divisors (448242278).

861736378 is a wasteful number, since it uses less digits than its factorization.

861736378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7229.

The product of its digits is 1016064, while the sum is 49.

The square root of 861736378 is about 29355.3466680263. The cubic root of 861736378 is about 951.6081268831.

The spelling of 861736378 in words is "eight hundred sixty-one million, seven hundred thirty-six thousand, three hundred seventy-eight".