206864378 has 12 divisors (see below), whose sum is σ = 360957402. Its totient is φ = 88656120.

The previous prime is 206864377. The next prime is 206864473. The reversal of 206864378 is 873468602.

It can be written as a sum of positive squares in only one way, i.e., 158936449 + 47927929 = 12607^2 + 6923^2 .

It is not an unprimeable number, because it can be changed into a prime (206864377) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1055333 + ... + 1055528.

Almost surely, 2^206864378 is an apocalyptic number.

206864378 is a deficient number, since it is larger than the sum of its proper divisors (154093024).

206864378 is a wasteful number, since it uses less digits than its factorization.

206864378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110877 (or 2110870 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 206864378 is about 14382.7806073791. The cubic root of 206864378 is about 591.4189518166.

The spelling of 206864378 in words is "two hundred six million, eight hundred sixty-four thousand, three hundred seventy-eight".