206464 has 16 divisors (see below), whose sum is σ = 411570. Its totient is φ = 103168.
The previous prime is 206461. The next prime is 206467. The reversal of 206464 is 464602.
It is an interprime number because it is at equal distance from previous prime (206461) and next prime (206467).
It can be written as a sum of positive squares in only one way, i.e., 166464 + 40000 = 408^2 + 200^2 .
It is a tau number, because it is divible by the number of its divisors (16).
It is not an unprimeable number, because it can be changed into a prime (206461) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 679 + ... + 934.
2206464 is an apocalyptic number.
It is an amenable number.
206464 is a deficient number, since it is larger than the sum of its proper divisors (205106).
206464 is an equidigital number, since it uses as much as digits as its factorization.
206464 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1627 (or 1615 counting only the distinct ones).
The product of its (nonzero) digits is 1152, while the sum is 22.
The square root of 206464 is about 454.3830982772. The cubic root of 206464 is about 59.1037149223.
The spelling of 206464 in words is "two hundred six thousand, four hundred sixty-four".
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