206389464 has 16 divisors (see below), whose sum is σ = 515973720. Its totient is φ = 68796480.

The previous prime is 206389453. The next prime is 206389483. The reversal of 206389464 is 464983602.

It is a happy number.

It is a super-2 number, since 2×206389464² = 85193221700414592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4299757 + ... + 4299804.

Almost surely, 2^206389464 is an apocalyptic number.

206389464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

206389464 is an abundant number, since it is smaller than the sum of its proper divisors (309584256).

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

206389464 is a wasteful number, since it uses less digits than its factorization.

206389464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8599570 (or 8599566 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 206389464 is about 14366.2613090532. The cubic root of 206389464 is about 590.9660168102.

The spelling of 206389464 in words is "two hundred six million, three hundred eighty-nine thousand, four hundred sixty-four".