206440456 has 32 divisors (see below), whose sum is σ = 404677440. Its totient is φ = 98543808.

The previous prime is 206440417. The next prime is 206440457. The reversal of 206440456 is 654044602.

It is not an unprimeable number, because it can be changed into a prime (206440457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166270 + ... + 167506.

It is an arithmetic number, because the mean of its divisors is an integer number (12646170).

Almost surely, 2^206440456 is an apocalyptic number.

It is an amenable number.

206440456 is a deficient number, since it is larger than the sum of its proper divisors (198236984).

206440456 is a wasteful number, since it uses less digits than its factorization.

206440456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173 (or 2169 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 206440456 is about 14368.0359130954. The cubic root of 206440456 is about 591.0146821783.

The spelling of 206440456 in words is "two hundred six million, four hundred forty thousand, four hundred fifty-six".