861475378 has 8 divisors (see below), whose sum is σ = 1298707200. Its totient is φ = 428572980.

The previous prime is 861475369. The next prime is 861475387. The reversal of 861475378 is 873574168.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (861475369) and next prime (861475387).

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

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, 1081858 + ... + 1082653.

It is an arithmetic number, because the mean of its divisors is an integer number (162338400).

Almost surely, 2^861475378 is an apocalyptic number.

861475378 is a deficient number, since it is larger than the sum of its proper divisors (437231822).

861475378 is a wasteful number, since it uses less digits than its factorization.

861475378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164712.

The product of its digits is 1128960, while the sum is 49.

The square root of 861475378 is about 29350.9008038936. The cubic root of 861475378 is about 951.5120438245.

The spelling of 861475378 in words is "eight hundred sixty-one million, four hundred seventy-five thousand, three hundred seventy-eight".