206771964 has 36 divisors (see below), whose sum is σ = 561239784. Its totient is φ = 59077536.

The previous prime is 206771963. The next prime is 206771977. The reversal of 206771964 is 469177602.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206771963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175239 + ... + 176414.

It is an arithmetic number, because the mean of its divisors is an integer number (15589994).

Almost surely, 2^206771964 is an apocalyptic number.

It is an amenable number.

206771964 is an abundant number, since it is smaller than the sum of its proper divisors (354467820).

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

206771964 is a wasteful number, since it uses less digits than its factorization.

206771964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351674 (or 351665 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 206771964 is about 14379.5675873790. The cubic root of 206771964 is about 591.3308690956.

The spelling of 206771964 in words is "two hundred six million, seven hundred seventy-one thousand, nine hundred sixty-four".