378578866 has 8 divisors (see below), whose sum is σ = 570306204. Its totient is φ = 188476800.

The previous prime is 378578801. The next prime is 378578881. The reversal of 378578866 is 668875873.

It can be written as a sum of positive squares in 2 ways, for example, as 366531025 + 12047841 = 19145^2 + 3471^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 378578866.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405735 + ... + 406666.

Almost surely, 2^378578866 is an apocalyptic number.

378578866 is a deficient number, since it is larger than the sum of its proper divisors (191727338).

378578866 is a wasteful number, since it uses less digits than its factorization.

378578866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812636.

The product of its digits is 13547520, while the sum is 58.

The square root of 378578866 is about 19457.1032273563. The cubic root of 378578866 is about 723.4115781531.

The spelling of 378578866 in words is "three hundred seventy-eight million, five hundred seventy-eight thousand, eight hundred sixty-six".