378888639 has 16 divisors (see below), whose sum is σ = 535374432. Its totient is φ = 237523968.

The previous prime is 378888617. The next prime is 378888641. The reversal of 378888639 is 936888873.

It is a happy number.

It is not a de Polignac number, because 378888639 - 2⁹ = 378888127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378888689) 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 15 ways as a sum of consecutive naturals, for example, 71547 + ... + 76659.

It is an arithmetic number, because the mean of its divisors is an integer number (33460902).

Almost surely, 2^378888639 is an apocalyptic number.

378888639 is a deficient number, since it is larger than the sum of its proper divisors (156485793).

378888639 is a wasteful number, since it uses less digits than its factorization.

378888639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6586.

The product of its digits is 13934592, while the sum is 60.

The square root of 378888639 is about 19465.0620086349. The cubic root of 378888639 is about 723.6088354056.

The spelling of 378888639 in words is "three hundred seventy-eight million, eight hundred eighty-eight thousand, six hundred thirty-nine".