206438228634 has 64 divisors (see below), whose sum is σ = 480923993088. Its totient is φ = 58445587200.

The previous prime is 206438228599. The next prime is 206438228683. The reversal of 206438228634 is 436822834602.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1516047 + ... + 1646594.

It is an arithmetic number, because the mean of its divisors is an integer number (7514437392).

Almost surely, 2^206438228634 is an apocalyptic number.

206438228634 is an abundant number, since it is smaller than the sum of its proper divisors (274485764454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206438228634 is a wasteful number, since it uses less digits than its factorization.

206438228634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162723.

The product of its (nonzero) digits is 2654208, while the sum is 48.

The spelling of 206438228634 in words is "two hundred six billion, four hundred thirty-eight million, two hundred twenty-eight thousand, six hundred thirty-four".