378339845 has 16 divisors (see below), whose sum is σ = 517693680. Its totient is φ = 262953984.

The previous prime is 378339833. The next prime is 378339847. The reversal of 378339845 is 548933873.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 13300609 + 365039236 = 3647^2 + 19106^2 .

It is a cyclic number.

It is not a de Polignac number, because 378339845 - 2⁸ = 378339589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 378339793 and 378339802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378339847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170090 + ... + 172299.

It is an arithmetic number, because the mean of its divisors is an integer number (32355855).

Almost surely, 2^378339845 is an apocalyptic number.

It is an amenable number.

378339845 is a deficient number, since it is larger than the sum of its proper divisors (139353835).

378339845 is a wasteful number, since it uses less digits than its factorization.

378339845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342424.

The product of its digits is 2177280, while the sum is 50.

The square root of 378339845 is about 19450.9600020153. The cubic root of 378339845 is about 723.2593008013.

The spelling of 378339845 in words is "three hundred seventy-eight million, three hundred thirty-nine thousand, eight hundred forty-five".