378984878 has 4 divisors (see below), whose sum is σ = 568477320. Its totient is φ = 189492438.

The previous prime is 378984877. The next prime is 378984901. The reversal of 378984878 is 878489873.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 378984878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378984871) 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 as a sum of consecutive naturals, namely, 94746218 + ... + 94746221.

It is an arithmetic number, because the mean of its divisors is an integer number (142119330).

Almost surely, 2^378984878 is an apocalyptic number.

378984878 is a deficient number, since it is larger than the sum of its proper divisors (189492442).

378984878 is a wasteful number, since it uses less digits than its factorization.

378984878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189492441.

The product of its digits is 21676032, while the sum is 62.

The square root of 378984878 is about 19467.5339475754. The cubic root of 378984878 is about 723.6700965856.

The spelling of 378984878 in words is "three hundred seventy-eight million, nine hundred eighty-four thousand, eight hundred seventy-eight".