378478 has 4 divisors (see below), whose sum is σ = 567720. Its totient is φ = 189238.

The previous prime is 378467. The next prime is 378493. The reversal of 378478 is 874873.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

378478 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 94618 + ... + 94621.

It is an arithmetic number, because the mean of its divisors is an integer number (141930).

2³⁷⁸⁴⁷⁸ is an apocalyptic number.

378478 is a deficient number, since it is larger than the sum of its proper divisors (189242).

378478 is a wasteful number, since it uses less digits than its factorization.

378478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189241.

The product of its digits is 37632, while the sum is 37.

The square root of 378478 is about 615.2056566710. The cubic root of 378478 is about 72.3347325479.

It can be divided in two parts, 37 and 8478, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 378478 in words is "three hundred seventy-eight thousand, four hundred seventy-eight".