378128387 has 8 divisors (see below), whose sum is σ = 465388896. Its totient is φ = 299178432.

The previous prime is 378128351. The next prime is 378128423. The reversal of 378128387 is 783821873.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (378128351) and next prime (378128423).

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

It is not a de Polignac number, because 378128387 - 2⁶ = 378128323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (378128327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2077538 + ... + 2077719.

It is an arithmetic number, because the mean of its divisors is an integer number (58173612).

Almost surely, 2^378128387 is an apocalyptic number.

378128387 is a deficient number, since it is larger than the sum of its proper divisors (87260509).

378128387 is a wasteful number, since it uses less digits than its factorization.

378128387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155277.

The product of its digits is 451584, while the sum is 47.

The square root of 378128387 is about 19445.5235722775. The cubic root of 378128387 is about 723.1245300221.

The spelling of 378128387 in words is "three hundred seventy-eight million, one hundred twenty-eight thousand, three hundred eighty-seven".