378513818 has 4 divisors (see below), whose sum is σ = 567770730. Its totient is φ = 189256908.

The previous prime is 378513799. The next prime is 378513841. The reversal of 378513818 is 818315873.

378513818 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 301126609 + 77387209 = 17353^2 + 8797^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94628453 + ... + 94628456.

Almost surely, 2^378513818 is an apocalyptic number.

378513818 is a deficient number, since it is larger than the sum of its proper divisors (189256912).

378513818 is a wasteful number, since it uses less digits than its factorization.

378513818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189256911.

The product of its digits is 161280, while the sum is 44.

The square root of 378513818 is about 19455.4315809236. The cubic root of 378513818 is about 723.3701432184.

The spelling of 378513818 in words is "three hundred seventy-eight million, five hundred thirteen thousand, eight hundred eighteen".