378211805 has 8 divisors (see below), whose sum is σ = 454598232. Its totient is φ = 302073408.

The previous prime is 378211787. The next prime is 378211807. The reversal of 378211805 is 508112873.

It can be written as a sum of positive squares in 4 ways, for example, as 35295481 + 342916324 = 5941^2 + 18518^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 378211805 - 2⁶ = 378211741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378211807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58634 + ... + 64763.

It is an arithmetic number, because the mean of its divisors is an integer number (56824779).

Almost surely, 2^378211805 is an apocalyptic number.

It is an amenable number.

378211805 is a deficient number, since it is larger than the sum of its proper divisors (76386427).

378211805 is a wasteful number, since it uses less digits than its factorization.

378211805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124015.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 378211805 is about 19447.6683692416. The cubic root of 378211805 is about 723.1777017039.

The spelling of 378211805 in words is "three hundred seventy-eight million, two hundred eleven thousand, eight hundred five".