378986138 has 8 divisors (see below), whose sum is σ = 574108020. Its totient is φ = 187616800.

The previous prime is 378986099. The next prime is 378986177. The reversal of 378986138 is 831689873.

It is an interprime number because it is at equal distance from previous prime (378986099) and next prime (378986177).

It can be written as a sum of positive squares in 2 ways, for example, as 269846329 + 109139809 = 16427^2 + 10447^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 378986138.

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 3 ways as a sum of consecutive naturals, for example, 937883 + ... + 938286.

Almost surely, 2^378986138 is an apocalyptic number.

378986138 is a deficient number, since it is larger than the sum of its proper divisors (195121882).

378986138 is a wasteful number, since it uses less digits than its factorization.

378986138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876272.

The product of its digits is 1741824, while the sum is 53.

The square root of 378986138 is about 19467.5663091204. The cubic root of 378986138 is about 723.6708985730.

The spelling of 378986138 in words is "three hundred seventy-eight million, nine hundred eighty-six thousand, one hundred thirty-eight".