206423460 has 36 divisors (see below), whose sum is σ = 626151708. Its totient is φ = 55046208.

The previous prime is 206423417. The next prime is 206423461. The reversal of 206423460 is 64324602.

It can be written as a sum of positive squares in 2 ways, for example, as 83612736 + 122810724 = 9144^2 + 11082^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×206423460² = 85221289676743200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206423461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 573219 + ... + 573578.

It is an arithmetic number, because the mean of its divisors is an integer number (17393103).

Almost surely, 2^206423460 is an apocalyptic number.

206423460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206423460 is an abundant number, since it is smaller than the sum of its proper divisors (419728248).

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

206423460 is a wasteful number, since it uses less digits than its factorization.

206423460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146812 (or 1146807 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 206423460 is about 14367.4444491705. Note that the first 5 decimals coincide. The cubic root of 206423460 is about 590.9984625519.

The spelling of 206423460 in words is "two hundred six million, four hundred twenty-three thousand, four hundred sixty".