378639 has 6 divisors (see below), whose sum is σ = 546936. Its totient is φ = 252420.

The previous prime is 378629. The next prime is 378661. The reversal of 378639 is 936873.

378639 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 378639 - 2⁹ = 378127 is a prime.

378639 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 378639.

It is not an unprimeable number, because it can be changed into a prime (378619) 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 5 ways as a sum of consecutive naturals, for example, 21027 + ... + 21044.

It is an arithmetic number, because the mean of its divisors is an integer number (91156).

2³⁷⁸⁶³⁹ is an apocalyptic number.

378639 is a deficient number, since it is larger than the sum of its proper divisors (168297).

378639 is a wasteful number, since it uses less digits than its factorization.

378639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42077 (or 42074 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 378639 is about 615.3364933108. The cubic root of 378639 is about 72.3449878696.

The spelling of 378639 in words is "three hundred seventy-eight thousand, six hundred thirty-nine".