378646 has 8 divisors (see below), whose sum is σ = 575064. Its totient is φ = 186960.

The previous prime is 378629. The next prime is 378661. The reversal of 378646 is 646873.

378646 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a d-powerful number, because it can be written as 3³ + 7³ + 6² + 8⁵ + 4⁸ + 6⁷ .

It is a congruent number.

It is an unprimeable number.

378646 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 975 + ... + 1306.

It is an arithmetic number, because the mean of its divisors is an integer number (71883).

2³⁷⁸⁶⁴⁶ is an apocalyptic number.

378646 is a deficient number, since it is larger than the sum of its proper divisors (196418).

378646 is a wasteful number, since it uses less digits than its factorization.

378646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366.

The product of its digits is 24192, while the sum is 34.

The square root of 378646 is about 615.3421812293. The cubic root of 378646 is about 72.3454336872.

It can be divided in two parts, 378 and 646, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 378646 in words is "three hundred seventy-eight thousand, six hundred forty-six".