206044040 has 32 divisors (see below), whose sum is σ = 468198360. Its totient is φ = 81600000.

The previous prime is 206044039. The next prime is 206044049. The reversal of 206044040 is 40440602.

It can be written as a sum of positive squares in 4 ways, for example, as 206037316 + 6724 = 14354^2 + 82^2 .

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (206044049) 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, 21461 + ... + 29540.

Almost surely, 2^206044040 is an apocalyptic number.

206044040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206044040 is an abundant number, since it is smaller than the sum of its proper divisors (262154320).

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

206044040 is a wasteful number, since it uses less digits than its factorization.

206044040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51113 (or 51109 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 206044040 is about 14354.2342185155. The cubic root of 206044040 is about 590.6361423577.

Adding to 206044040 its reverse (40440602), we get a palindrome (246484642).

The spelling of 206044040 in words is "two hundred six million, forty-four thousand, forty".