378199986 has 32 divisors (see below), whose sum is σ = 801912960. Its totient is φ = 118500096.

The previous prime is 378199979. The next prime is 378199999. The reversal of 378199986 is 689991873.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 99835 + ... + 103553.

It is an arithmetic number, because the mean of its divisors is an integer number (25059780).

Almost surely, 2^378199986 is an apocalyptic number.

378199986 is an abundant number, since it is smaller than the sum of its proper divisors (423712974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

378199986 is a wasteful number, since it uses less digits than its factorization.

378199986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4738.

The product of its digits is 5878656, while the sum is 60.

The square root of 378199986 is about 19447.3645001064. The cubic root of 378199986 is about 723.1701686002.

The spelling of 378199986 in words is "three hundred seventy-eight million, one hundred ninety-nine thousand, nine hundred eighty-six".