378685439 has 8 divisors (see below), whose sum is σ = 421901568. Its totient is φ = 336934360.

The previous prime is 378685427. The next prime is 378685441. The reversal of 378685439 is 934586873.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378685439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378685459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365717 + ... + 366750.

It is an arithmetic number, because the mean of its divisors is an integer number (52737696).

Almost surely, 2^378685439 is an apocalyptic number.

378685439 is a deficient number, since it is larger than the sum of its proper divisors (43216129).

378685439 is a wasteful number, since it uses less digits than its factorization.

378685439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732525.

The product of its digits is 4354560, while the sum is 53.

The square root of 378685439 is about 19459.8417002811. The cubic root of 378685439 is about 723.4794538462.

The spelling of 378685439 in words is "three hundred seventy-eight million, six hundred eighty-five thousand, four hundred thirty-nine".